Abbas Asadi - Academia.edu (original) (raw)
Papers by Abbas Asadi
The purpose of this study was to examine the effects of six weeks of depth jump (DJ) vs countermo... more The purpose of this study was to examine the effects of six weeks of depth jump (DJ) vs countermovement jump (CMJ) training on sand on muscle soreness, jump, sprint, agility and leg press strength. Thirty healthy men (age 20.4±1.1 years; height 177.4±5.1 cm; and mass 72.8±9.7 kg) volunteered to participate and were randomly assigned to one of three groups: DJ training group (n=10), CMJ training group (n=10) or control group (n=10). The experimental groups performed either DJ or CMJ training two days a week for six weeks. The training program included five sets of 20 repetitions DJ (from the height of a 45-cm box) or CMJ exercise onto 20 cm of dry sand. Assessments of Vertical Jump Test (VJT), Standing Long Jump Test (SLJT), 20 and 40 m sprints, T-Test (TT), Illinois Agility Test (IAT), and one-repetition maximum Leg Press (1RMLP) were performed a week before and following the 6-week training period. Muscle soreness was also measured pre, immediately post, 24 and 48 hours after the f...
The purpose of this study was to examine the effects of in-season plyometric training program on ... more The purpose of this study was to examine the effects of in-season plyometric training program on balance and sprint performance in basketball players. Twenty intermediate basketball players participated in this study and were divided into two groups; plyometric training (PL; n = 10) and control group (CG; n = 10). Plyometric training took place 2 days a week for 6 weeks including depth jump, vertical jump, and standing long jump. Star Excursion Balance Test (SEBT) and 20-m sprint were measured at pre- and post-training. The PL demonstrated significant improvement (P 0.05) in SEBT, but PL showed ~5% improvement. In conclusions, it could be concluded that a 6-week in-season plyometric program can improve sprint and balance in male basketball players. Also, this study provides support for coaches and basketball players who use this training method at during competitive phase.
Kinesiology: international journal of fundamental and applied kinesiology, 2014
The purpose of this study was to examine the effects of six weeks of depth jump (DJ) vs. counterm... more The purpose of this study was to examine the effects of six weeks of depth jump (DJ) vs. countermovement jump (CMJ) training on sand on muscle soreness, jump, sprint, agility and leg press strength. Thirty healthy men (age 20.4±1.1 years; height 177.4±5.1 cm; mass 72.8±9.7 kg) volunteered to participate and were randomly assigned to one of three groups: DJ training group (n=10), CMJ training group (n=10) or control group (n=10). The experimental groups performed either DJ or CMJ training two days a week for six weeks. The training program included five sets of 20 repetitions DJ (from the height of a 45-cm box) or CMJ exercise onto 20 cm of dry sand. Assessments of Vertical Jump Test (VJT), Standing Long Jump Test (SLJT), 20 and 40 m sprints, T-Test (TT), Illinois Agility Test (IAT), and one-repetition maximum Leg Press (1RM LP ) were performed a week before and following the 6-week training period. Muscle soreness was also measured pre, immediately post, 24 and 48 hours after the fi...
BMC Geriatrics, 2021
Background Regarding an important effects of physical exercise on brain function in elders, the a... more Background Regarding an important effects of physical exercise on brain function in elders, the aim of this study was to examine the effects of strength and endurance exercise on brain neurobiological factors in older men. Methods Thirty older men volunteered to participate in this study and were randomly assigned to strength, endurance and control groups. The subjects in strength group performed two circuits of resistance exercise (6 exercises with 10 repetition of 65–70% of one repetition maximum), while endurance group performed 30 min running with 65–70% of maximal heart rate. Blood was obtained pre and post-exercise to determine changes in serum BDNF, IGF-1 and platelets. Results After exercise, both the strength and endurance groups showed significant increases in serum BDNF and IGF-1 concentrations and platelets at post-exercise and in comparison to control group (p < 0.05). In addition, no statistically significant differences were detected between the strength and endura...
Biomedical Human Kinetics, 2020
Summary Study aim: The aim of this study was to examine the effects of 8 weeks of resistance trai... more Summary Study aim: The aim of this study was to examine the effects of 8 weeks of resistance training (RT) with three vs. four sessions per week and equated training volume on muscular adaptations in men. Materials and methods: Thirty-three healthy young men volunteered to participate in the study and were randomly assigned to three times per week whole-body RT (RT3, n = 11), four times per week whole-body RT (RT4, n = 11) or a control group (CG, n = 11). Before and after training, participants were evaluated for one-repetition maximum (1RM) and muscular endurance (i.e., 60% of 1RM to failure) for the leg press and bench press. In addition, thigh, arm, chest, and calf circumferences, and percent body fat were assessed before and after training. Results: The findings revealed significant main effects of time for chest and thigh circumferences (p ≤ 0.05). There were no significant group × time interactions for chest and thigh circumferences (p > 0.05), but the RT4 showed greater ch...
![Research paper thumbnail of Relationship between test of postural control and strength and ability tests in basketball players. [Relación entre las pruebas de control postural y las pruebas de fuerza y habilidad en jugadores de baloncesto]](https://attachments.academia-assets.com/106908081/thumbnails/1.jpg)
](RICYDE. Revista internacional de ciencias del deporte, 2018
This study investigated the relationship between performance tests (i.e., jumping ability, streng... more This study investigated the relationship between performance tests (i.e., jumping ability, strength, sprint and change of direction ability) and dynamic postural control in young basketball players. Twenty-three young basketball players participated in this study and performed measurements of dynamic balance (Star Excursion Balance Test [SEBT]), countermovement jump (CMJ), broad long jump (BLJ), 4×9-m shuttle run, agility T test (TT), Illinois agility test (IAT), 20-m sprint and lower extremity muscle strength. Significant association was observed between balance (at medial direction) and strength performance (r = 0.523, p < 0.05). Significant positive correlations were detected between directions of SEBT and BLJ (r =-0.466 to-0.479, p < 0.05), 4×9-m shuttle run (r =-0.403 to 0.486, p < 0.05), TT (r =-0.410, p < 0.05), IAT (r = 0.435, p < 0.05) and sprint (r =-0.402 to 0.452, p < 0.05). Postural control is more in relation to change of direction ability, sprint and power performance in basketball athletes.
Brazilian Journal of Kinanthropometry and Human Performance, 2016
DOI: http://dx.doi.org/10.5007/1980-0037.2016v18n2p177 The purpose of this study was to determine... more DOI: http://dx.doi.org/10.5007/1980-0037.2016v18n2p177 The purpose of this study was to determine the relationships between sprint, agility and jump performance of elite young basketball players. Sixteen elite national level young male basketball players participated in this study. The jumping ability of each player was determined using countermovement jump (CMJ), and broad long jump (BLJ). The agility T test (TT) and Illinois agility test (IAT) were assessed to determine the agility, and 20-m sprint time was also measured to determine sprint performance. The results of Pearson Product Moment Correlation analysis indicated moderate correlation between training age and IAT (r = -0.57; p = 0.021). Strong correlations were found between CMJ and BLJ (r = 0.71; p = 0.002), and between TT and IAT (r = 0.70; p = 0.002). Similarly, 20-m sprint time was strong correlated with CMJ (r = -0.61; p = 0.011), BLJ (r = -0.76; p = 0.001), TT (r = 0.77; p = 0.001), and IAT (r = 0.68; p = 0.003). In a...
Frontiers in Physiology, 2019
The purpose of this study was to examine the effect of β-hydroxy-β methylbutyrate free acid (HMB-... more The purpose of this study was to examine the effect of β-hydroxy-β methylbutyrate free acid (HMB-FA) ingestion on oxidative stress and leukocyte responses to plyometric exercise. Methods: In a randomized double-blind placebo-controlled design, physically active males were assigned to the HMB-FA (n = 8) or placebo (n = 8) groups that consumed either 1 g of HMB-FA or placebo 30 min prior to performing an acute plyometric exercise protocol (15 sets of 10 repetitions of maximal-effort vertical jumps). Blood was obtained pre-(T1), post-(T2), and 1-h post-(T3) exercise to determine changes in serum levels of 8-hydroxy-2-deoxyguanosine (8-OHdG), malondialdehyde (MDA), protein carbonyl (PC), and white blood cells (WBC). Results: The exercise protocol significantly elevated 8-OHdG (HMB-FA, T2 9.5 and T3 12.6%; placebo, T2 18.2 and T3 36.5%), MDA (HMB-FA, T2 11.6 and T3 25.2%; placebo, T2 11.8 and T3 41%) and PC (HMB-FA, T2 6.9 and T3 25%; placebo, T2 23.4 and T3 55.3%) at post-and 1-h post-exercise, respectively. However, at 1-h post-exercise, greater increases in oxidative stress markers (8-OHdG 36.5 vs. 12.6%; MDA 41 vs. 25.1% and PC 55.3 vs. 25%) were observed in the placebo group compared to the HMB-FA group (p < 0.05). In addition, the WBC level was greater for the placebo group in comparison to the HMB-FA group at post-exercise. Conclusion: HMB-FA attenuated oxidative stress and leukocyte responses to plyometric exercise compared with placebo.
Kinesiology, 2016
Cells continuously produce free radicals and reactive oxygen species (ROS) as part of metabolic p... more Cells continuously produce free radicals and reactive oxygen species (ROS) as part of metabolic processes. Exercise can induce an imbalance between ROS and antioxidants, which is referred to as oxidative stress. Acute bout of resistance exercise (RE) induces activation of several distinct systems of radicals generation, but the effects of different RE loading on oxidative stress response is not clear. Therefore, the purpose of this study was to examine the influence of cluster vs. traditional sets of RE on oxidative DNA damage, lipid peroxidation and uric acid response in athletes. To elicit blood oxidative stress, 12 professional young male volleyball players undertook two different RE loading patterns: 1) cluster loading pattern, 2) traditional loading pattern which was standardized for total volume and completed in a randomized crossover fashion with a four-day interval between trials. Blood samples were collected before and after RE for markers of oxidative stress and damage. In...
Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme, 2018
The primary purpose of this investigation was to determine the impact of altering the set structu... more The primary purpose of this investigation was to determine the impact of altering the set structure during an 8-week resistance training program on anthropometric, hormonal, and strength power characteristics. Thirty female volleyball players were recruited for participation and then randomly assigned to 1 of 3 resistance training groups: (i) cluster sets (CRT; n = 10), (ii) traditional sets (TRT; n = 10), or (iii) control (CON; n = 10). All athletes were evaluated for thigh and arm circumference, vertical jump, 20-m sprint, 4 × 9-m shuttle-run, 1-repetition maximum (1RM) back squat, bench press, military press, and deadlift prior to and after an 8-week periodized training intervention. Blood samples were taken before and after the 8-week training period to evaluate resting testosterone, cortisol, and insulin-like growth factor 1 responses to the training period. After 8 weeks of training the CRT group displayed a small but significant improvement in vertical jump (CRT: effect size ...
Sports, 2017
The purpose of this study was to compare the effects of two types of high-intensity interval trai... more The purpose of this study was to compare the effects of two types of high-intensity interval training (HIIT) programs on aerobic and anaerobic capacity of female soccer players. Regional-level female athletes were randomly divided into heart rate-based HIIT (n = 8; age 23.4 ± 1.1 year) and speed-based HIIT groups (n = 8; age 23.4 ± 1.3 year). Athletes trained three days per week for six weeks. Before and after training, each athlete's performance was assessed directly through the Hoff test, 30-15 Intermittent Fitness Test (VIFT), and repeated-sprint ability test (RAST); maximal oxygen consumption (VO 2 max), power and fatigue were estimated indirectly. Both experimental groups improved power, fatigue index and VO 2 max after training (p < 0.05). It was noteworthy that the speed-based group had greater gains in minimal power (effect size (ES): 3.99 vs. 0.75), average power (ES: 2.23 vs. 0.33), and fatigue index (ES: 2.53 vs. 0.17) compared to heart rate-based group (p < 0.05). In conclusion, both heart rate-based and speed-based HIIT induced meaningful improvements in power, VO 2 max, and fatigue index in female soccer players, although the speed-based HIIT group achieved greater gains in power and fatigue index compared to the heart rate-based group.
Journal of strength and conditioning research, Jan 23, 2017
Although plyometric training (PT) improves change of direction (COD) ability, the influence of ag... more Although plyometric training (PT) improves change of direction (COD) ability, the influence of age on COD gains after PT is unclear. Therefore, the aim of this systematic review was to identify the age-related pattern of improvement in COD ability after PT in youths. A computerized search within six databases was performed, selecting studied based on specific inclusion criteria: experimental trials published in English-language journals, PT focused on the lower body, COD ability measurements reported before and after training, and male participants aged 10-to-18 years old. Sixteen articles with a total of 30 effect sizes (ESs) in the experimental groups and 13 ESs in the control groups were included. For the analyses, subjects were catagorized into three age groups: 10 to 12.9 years of age (PRE), 13 to 15.9 years of age (MID) and 16 to 18 years of age (POST). Independent of age, PT improved COD ability in youths (ES = 0.86, time gains [TG = -0.61]). However, a tendency toward greate...
Journal of Human Sport and Exercise, 2015
Asadi, A. (2015). Muscular performance adaptations to short-term plyometric training on sand: inf... more Asadi, A. (2015). Muscular performance adaptations to short-term plyometric training on sand: influence of interday rest. J. Hum. Sport Exerc., 10(3), pp.775-784. The aim of the current investigation was to determine the effects of short-term plyometric depth jump training on sand interposed with 48 hours or 72 hours of rest between training sessions on power type muscular adaptations in recreationally physical active men. Fifteen collegiate physical active men, who were familiar with plyometric exercise, participated in this study and were randomly divided into 2 groups: plyometric training with 48 h (PT48, N=7) and 72 h (PT72, N=8) of rest between training sessions. Pre and post training on sand, participants were measured in vertical jump (VJ), standing long jump (SLJ), agility t Test (TT), 20 and 40 m sprints, and one repetition maximum leg press (1RMLP). The plyometric training program on sand was applied during 6 weeks, 2 sessions per week, with 5 sets of 20 repetitions depth jump exercise from 45 cm box height. After completing 6 weeks training period, the PT48 and PT72 groups showed significant improvement in all performance tests (p<0.05), with statistically significant differences between treatments in TT and 40 m sprint time. With regard to significant differences in TT and 40 m sprint for PT72 compared with PT48 and greater improvements for PT72 in all tests, it can be recommend that coaches, strength and conditioning professionals apply 72 h rest between plyometric training sessions when sand surface was used.
Medicina, 2016
The aim of this study was to compare the effects of 6-week cluster versus traditional plyometric ... more The aim of this study was to compare the effects of 6-week cluster versus traditional plyometric training sets on jumping ability, sprint and agility performance. Materials and methods: Thirteen college students were assigned to a cluster sets group (N = 6) or traditional sets group (N = 7). Both training groups completed the same training program. The traditional group completed five sets of 20 repetitions with 2 min of rest between sets each session, while the cluster group completed five sets of 20 [2 Â 10] repetitions with 30/90s rest each session. Subjects were evaluated for countermovement jump (CMJ), standing long jump (SLJ), t test, 20-m and 40-m sprint test performance before and after the intervention. Results: Both groups had similar improvements (P < 0.05) in CMJ, SLJ, t test, 20-m, and 40-m sprint. However, the magnitude of improvement in CMJ, SLJ and t test was greater for the cluster group (effect size [ES] = 1.24, 0.81 and 1.38, respectively) compared to the traditional group (ES = 0.84, 0.60 and 0.55). Conversely, the magnitude of improvement in 20-m and 40m sprint test was greater for the traditional group (ES = 1.59 and 0.96, respectively) compared to the cluster group (ES = 0.94 and 0.75, respectively). Conclusions: Although both plyometric training methods improved lower body maximalintensity exercise performance, the traditional sets methods resulted in greater adaptations in sprint performance, while the cluster sets method resulted in greater jump and agility adaptations.
Apunts Medicina De L Esport, 2013
Introducció. L'objectiu d'aquest estudi fou examinar l'efecte del test d'una repetició màxima en ... more Introducció. L'objectiu d'aquest estudi fou examinar l'efecte del test d'una repetició màxima en el dany i el dolor muscular en homes entrenats i no entrenats. Mètodes: Participaren a l'estudi 10 homes entrenats (E) i 10 no entrenats (NE). Els subjectes realitzaren un test d'una repetició màxima (1RM) de l'exercici d'esquat, i s'avaluà l'activitat de la creatina cinasa (CK), la concentració de la proteïna C reactiva (PCR) i el dolor muscular (quàdriceps i isquiotibials), a l'inici i al cap de 24, 48 i 72 hores després del test 1RM. Resultats: S'observaren increments significatius de l'activitat de la CK i dolor muscular a les 24, 48 i 72 hores després del test 1RM, així com diferències significatives entre els subjectes entrenats i els no entrenats (p < 0,05). En les concentracions de PCR, ambdós grups mostraren increments significatius en el descans, a les 24, 48 i 72 hores posteriors al test 1RM, i a les 72 hores en comparació amb les 24 hores (p < 0,05). No es detectaren diferències significatives de la concentració de la PCR (p > 0,05) entre els dos grups. Conclusió: En conclusió, el test d'1RM en l'exercici d'esquat (intensitat alta i volum baix) incrementa l'activitat de la CK, la concentració de la PCR en el plasma i el dolor muscular en subjectes entrenats i no entrenats. Es pot observar que el test 1RM pot induir dany muscular, cosa que suposaria un factor negatiu tant per als esportistes com per a la resta d'individus, donat que el dolor muscular s'associa a una disminució del rendiment.
The purpose of this study was to compare the effects of two different warm-up programs consist of... more The purpose of this study was to compare the effects of two different warm-up programs consist of Swiss massage and static-stretching on sprint, explosive performance and lower body flexibility in male college athletes. Twenty male college athletes (of three sport disciplines; indoor soccer, volleyball and basketball) with mean ± SD, age 25.1 ± 9.1 years; height 179.2 ± 6.1 cm; and body mass 66.2 ± 2.3 kg volunteered to participate in this study and were randomly divided into three groups; a) massage group (MG; n=7), static-stretching group (SSG; n=7), and rest group (RG; n=6). The SSG performed static-stretching movements for warming-up, MG performed Swiss massage for warming-up and CG had passive rest. Vertical jump (VJ), 30-m sprint, agility (T test) and sit & reach tests were assessed before (pre) and after (post) each of interventions. Both the SSG and MG showed significant worsening in VJ, sprint time and T test after each of intervention (P < 0.05). But, rest group showed ...
The purpose of this investigation was to compare the effects of six weeks of depth jump and count... more The purpose of this investigation was to compare the effects of six weeks of depth jump and countermovement jump training on agility performance. Eighteen male collegiate students participated in the present study and were randomly assigned to two groups: depth jump (DJ) and countermovement jump (CMJ). Subjects in the DJ and CMJ groups performed 5 sets of 20 repetition jumps from an 18-inch box at two days a week for six weeks. The Illinois agility test and T test were measured a week pre and post six weeks of training. A 2×2 analyses of variance was used for the statistical analyses. Both groups indicated significant improvement than pre training in Illinois agility test and T test (P<0.05); likewise, there were no significant differences between the DJ and CMJ training on agility performance after 6 weeks of training (P>0.05). In conclusion, the DJ and CMJ training improved agility performance, and it can be recommended that, coaches and athletes design these types of plyometric training for improving the ability of acceleration, deceleration and agility movements.
Physical Activity Review, 2015
The purpose of this study was to examine the effects of short-term plyometric depth jump training... more The purpose of this study was to examine the effects of short-term plyometric depth jump training on sand interposed with 48 hours or 72 hours of rest between training sessions on power type muscular adaptations in recreationally physical active men. Fifteen collegiate physical active men, who were familiar with plyometric exercise, participated in this study and were randomly divided into 2 groups: plyometric training with 48 h (PT48, N=7) and 72 h (PT72, N=8) of rest between training sessions. Pre and post training on sand, participants were measured in vertical jump (VJ), standing long jump (SLJ), agility t Test (TT), 20 and 40 m sprints, and one repetition maximum leg press (1RM LP). The plyometric training program on sand was applied during 6 weeks, 2 sessions per week, with 5 sets of 20 repetitions depth jump exercise from 45 cm box height. After completing 6 weeks training period, the PT48 and PT72 groups showed significant improvement in all performance tests (p<0.05), with statistically significant differences between treatments in TT and 40 m sprint time. With regard to significant differences in TT and 40 m sprint for PT72 compared with PT48 and greater improvements for PT72 in all tests, it can be recommend that coaches, strength and conditioning professionals apply 72 h rest between plyometric training sessions when sand surface was used.
INTERNATIONAL SPORTMED JOURNAL
Although a few studies examined the effects of plyometric exercise on cardiovascular responses an... more Although a few studies examined the effects of plyometric exercise on cardiovascular responses and symptoms of muscle damage, the data about the different types of plyometric exercise such as eccentric-based vs. concentric-based exercise is scarce. The purpose of the present investigation was to compare the effects of eccentric and concentric-based plyometric exercises on postexercise systolic (SBP) and diastolic blood pressure (DBP), heart rate (HR) and symptoms of muscle damage. Nineteen healthy men volunteered to participate in this study and were randomly assigned to two groups: Depth jump group (DJG; N=9; Eccentric) and Box jump group (BJG; N=10; Concentric). After plyometric exercise SBP, DBP and HR were measured every 10 min for a period of 90 min post-exercise. Also, muscle soreness, vertical jump and 10-m sprint were assessed at 24, 48, and 72 h postexercise. There were no significant changes in SBP and DBP, and no significant differences between groups in SBP and DBP, whereas the DJG showed greater increases in HR when compared with BJG. Both the groups indicated significant differences in muscle soreness, vertical jump and 10-m sprint at 24, 48 and 72 h post-exercise without significant differences between them. The findings of this study demonstrated that there were no differences in SBP and DBP between groups and both groups showed increases in symptoms of muscle damage following plyometric exercise.
The aim of this investigation was to determine the effectiveness of rating of perceived exertion ... more The aim of this investigation was to determine the effectiveness of rating of perceived exertion (RPE) scale to measure plyometric exercise intensity during low (L), moderate (M) and high (H) intensity. Fourteen physically active students (age; 21±1.1 y, height; 178.7±8.2 cm and body mass; 74.6±9.1 kg) volunteered to participate in this study and performed each intensity once separated with 24 h recovery. The H consisted of 1 set of 5 repetitions at 90% of the subject's vertical jump height (VJH). The M consisted of 10 repetitions at 70% VJT, and the L consisted of 1 set of 15 repetitions at 50% VJH. RPE was measured following the completion each intensity using 0-10 Borg RPE scale. Data was analyzed using repeated measures ANOVA and the level of significant was set at p < 0.05. The results indicated increases in RPE following enhancing exercise intensity (p < 0.05). Performing fewer repetitions at a higher intensity was perceived to be more difficult than performing more repetitions at a lower intensity. The results of the current investigation revealed that the RPE method is effective in monitoring different plyometric exercise and training intensities and it can be recommend that strength and conditioning professionals and athletes use the RPE method based on the effectiveness tool for monitoring their plyometric exercise and training sessions at different intensities.
The purpose of this study was to examine the effects of six weeks of depth jump (DJ) vs countermo... more The purpose of this study was to examine the effects of six weeks of depth jump (DJ) vs countermovement jump (CMJ) training on sand on muscle soreness, jump, sprint, agility and leg press strength. Thirty healthy men (age 20.4±1.1 years; height 177.4±5.1 cm; and mass 72.8±9.7 kg) volunteered to participate and were randomly assigned to one of three groups: DJ training group (n=10), CMJ training group (n=10) or control group (n=10). The experimental groups performed either DJ or CMJ training two days a week for six weeks. The training program included five sets of 20 repetitions DJ (from the height of a 45-cm box) or CMJ exercise onto 20 cm of dry sand. Assessments of Vertical Jump Test (VJT), Standing Long Jump Test (SLJT), 20 and 40 m sprints, T-Test (TT), Illinois Agility Test (IAT), and one-repetition maximum Leg Press (1RMLP) were performed a week before and following the 6-week training period. Muscle soreness was also measured pre, immediately post, 24 and 48 hours after the f...
The purpose of this study was to examine the effects of in-season plyometric training program on ... more The purpose of this study was to examine the effects of in-season plyometric training program on balance and sprint performance in basketball players. Twenty intermediate basketball players participated in this study and were divided into two groups; plyometric training (PL; n = 10) and control group (CG; n = 10). Plyometric training took place 2 days a week for 6 weeks including depth jump, vertical jump, and standing long jump. Star Excursion Balance Test (SEBT) and 20-m sprint were measured at pre- and post-training. The PL demonstrated significant improvement (P 0.05) in SEBT, but PL showed ~5% improvement. In conclusions, it could be concluded that a 6-week in-season plyometric program can improve sprint and balance in male basketball players. Also, this study provides support for coaches and basketball players who use this training method at during competitive phase.
Kinesiology: international journal of fundamental and applied kinesiology, 2014
The purpose of this study was to examine the effects of six weeks of depth jump (DJ) vs. counterm... more The purpose of this study was to examine the effects of six weeks of depth jump (DJ) vs. countermovement jump (CMJ) training on sand on muscle soreness, jump, sprint, agility and leg press strength. Thirty healthy men (age 20.4±1.1 years; height 177.4±5.1 cm; mass 72.8±9.7 kg) volunteered to participate and were randomly assigned to one of three groups: DJ training group (n=10), CMJ training group (n=10) or control group (n=10). The experimental groups performed either DJ or CMJ training two days a week for six weeks. The training program included five sets of 20 repetitions DJ (from the height of a 45-cm box) or CMJ exercise onto 20 cm of dry sand. Assessments of Vertical Jump Test (VJT), Standing Long Jump Test (SLJT), 20 and 40 m sprints, T-Test (TT), Illinois Agility Test (IAT), and one-repetition maximum Leg Press (1RM LP ) were performed a week before and following the 6-week training period. Muscle soreness was also measured pre, immediately post, 24 and 48 hours after the fi...
BMC Geriatrics, 2021
Background Regarding an important effects of physical exercise on brain function in elders, the a... more Background Regarding an important effects of physical exercise on brain function in elders, the aim of this study was to examine the effects of strength and endurance exercise on brain neurobiological factors in older men. Methods Thirty older men volunteered to participate in this study and were randomly assigned to strength, endurance and control groups. The subjects in strength group performed two circuits of resistance exercise (6 exercises with 10 repetition of 65–70% of one repetition maximum), while endurance group performed 30 min running with 65–70% of maximal heart rate. Blood was obtained pre and post-exercise to determine changes in serum BDNF, IGF-1 and platelets. Results After exercise, both the strength and endurance groups showed significant increases in serum BDNF and IGF-1 concentrations and platelets at post-exercise and in comparison to control group (p < 0.05). In addition, no statistically significant differences were detected between the strength and endura...
Biomedical Human Kinetics, 2020
Summary Study aim: The aim of this study was to examine the effects of 8 weeks of resistance trai... more Summary Study aim: The aim of this study was to examine the effects of 8 weeks of resistance training (RT) with three vs. four sessions per week and equated training volume on muscular adaptations in men. Materials and methods: Thirty-three healthy young men volunteered to participate in the study and were randomly assigned to three times per week whole-body RT (RT3, n = 11), four times per week whole-body RT (RT4, n = 11) or a control group (CG, n = 11). Before and after training, participants were evaluated for one-repetition maximum (1RM) and muscular endurance (i.e., 60% of 1RM to failure) for the leg press and bench press. In addition, thigh, arm, chest, and calf circumferences, and percent body fat were assessed before and after training. Results: The findings revealed significant main effects of time for chest and thigh circumferences (p ≤ 0.05). There were no significant group × time interactions for chest and thigh circumferences (p > 0.05), but the RT4 showed greater ch...
RICYDE. Revista internacional de ciencias del deporte, 2018
This study investigated the relationship between performance tests (i.e., jumping ability, streng... more This study investigated the relationship between performance tests (i.e., jumping ability, strength, sprint and change of direction ability) and dynamic postural control in young basketball players. Twenty-three young basketball players participated in this study and performed measurements of dynamic balance (Star Excursion Balance Test [SEBT]), countermovement jump (CMJ), broad long jump (BLJ), 4×9-m shuttle run, agility T test (TT), Illinois agility test (IAT), 20-m sprint and lower extremity muscle strength. Significant association was observed between balance (at medial direction) and strength performance (r = 0.523, p < 0.05). Significant positive correlations were detected between directions of SEBT and BLJ (r =-0.466 to-0.479, p < 0.05), 4×9-m shuttle run (r =-0.403 to 0.486, p < 0.05), TT (r =-0.410, p < 0.05), IAT (r = 0.435, p < 0.05) and sprint (r =-0.402 to 0.452, p < 0.05). Postural control is more in relation to change of direction ability, sprint and power performance in basketball athletes.
Brazilian Journal of Kinanthropometry and Human Performance, 2016
DOI: http://dx.doi.org/10.5007/1980-0037.2016v18n2p177 The purpose of this study was to determine... more DOI: http://dx.doi.org/10.5007/1980-0037.2016v18n2p177 The purpose of this study was to determine the relationships between sprint, agility and jump performance of elite young basketball players. Sixteen elite national level young male basketball players participated in this study. The jumping ability of each player was determined using countermovement jump (CMJ), and broad long jump (BLJ). The agility T test (TT) and Illinois agility test (IAT) were assessed to determine the agility, and 20-m sprint time was also measured to determine sprint performance. The results of Pearson Product Moment Correlation analysis indicated moderate correlation between training age and IAT (r = -0.57; p = 0.021). Strong correlations were found between CMJ and BLJ (r = 0.71; p = 0.002), and between TT and IAT (r = 0.70; p = 0.002). Similarly, 20-m sprint time was strong correlated with CMJ (r = -0.61; p = 0.011), BLJ (r = -0.76; p = 0.001), TT (r = 0.77; p = 0.001), and IAT (r = 0.68; p = 0.003). In a...
Frontiers in Physiology, 2019
The purpose of this study was to examine the effect of β-hydroxy-β methylbutyrate free acid (HMB-... more The purpose of this study was to examine the effect of β-hydroxy-β methylbutyrate free acid (HMB-FA) ingestion on oxidative stress and leukocyte responses to plyometric exercise. Methods: In a randomized double-blind placebo-controlled design, physically active males were assigned to the HMB-FA (n = 8) or placebo (n = 8) groups that consumed either 1 g of HMB-FA or placebo 30 min prior to performing an acute plyometric exercise protocol (15 sets of 10 repetitions of maximal-effort vertical jumps). Blood was obtained pre-(T1), post-(T2), and 1-h post-(T3) exercise to determine changes in serum levels of 8-hydroxy-2-deoxyguanosine (8-OHdG), malondialdehyde (MDA), protein carbonyl (PC), and white blood cells (WBC). Results: The exercise protocol significantly elevated 8-OHdG (HMB-FA, T2 9.5 and T3 12.6%; placebo, T2 18.2 and T3 36.5%), MDA (HMB-FA, T2 11.6 and T3 25.2%; placebo, T2 11.8 and T3 41%) and PC (HMB-FA, T2 6.9 and T3 25%; placebo, T2 23.4 and T3 55.3%) at post-and 1-h post-exercise, respectively. However, at 1-h post-exercise, greater increases in oxidative stress markers (8-OHdG 36.5 vs. 12.6%; MDA 41 vs. 25.1% and PC 55.3 vs. 25%) were observed in the placebo group compared to the HMB-FA group (p < 0.05). In addition, the WBC level was greater for the placebo group in comparison to the HMB-FA group at post-exercise. Conclusion: HMB-FA attenuated oxidative stress and leukocyte responses to plyometric exercise compared with placebo.
Kinesiology, 2016
Cells continuously produce free radicals and reactive oxygen species (ROS) as part of metabolic p... more Cells continuously produce free radicals and reactive oxygen species (ROS) as part of metabolic processes. Exercise can induce an imbalance between ROS and antioxidants, which is referred to as oxidative stress. Acute bout of resistance exercise (RE) induces activation of several distinct systems of radicals generation, but the effects of different RE loading on oxidative stress response is not clear. Therefore, the purpose of this study was to examine the influence of cluster vs. traditional sets of RE on oxidative DNA damage, lipid peroxidation and uric acid response in athletes. To elicit blood oxidative stress, 12 professional young male volleyball players undertook two different RE loading patterns: 1) cluster loading pattern, 2) traditional loading pattern which was standardized for total volume and completed in a randomized crossover fashion with a four-day interval between trials. Blood samples were collected before and after RE for markers of oxidative stress and damage. In...
Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme, 2018
The primary purpose of this investigation was to determine the impact of altering the set structu... more The primary purpose of this investigation was to determine the impact of altering the set structure during an 8-week resistance training program on anthropometric, hormonal, and strength power characteristics. Thirty female volleyball players were recruited for participation and then randomly assigned to 1 of 3 resistance training groups: (i) cluster sets (CRT; n = 10), (ii) traditional sets (TRT; n = 10), or (iii) control (CON; n = 10). All athletes were evaluated for thigh and arm circumference, vertical jump, 20-m sprint, 4 × 9-m shuttle-run, 1-repetition maximum (1RM) back squat, bench press, military press, and deadlift prior to and after an 8-week periodized training intervention. Blood samples were taken before and after the 8-week training period to evaluate resting testosterone, cortisol, and insulin-like growth factor 1 responses to the training period. After 8 weeks of training the CRT group displayed a small but significant improvement in vertical jump (CRT: effect size ...
Sports, 2017
The purpose of this study was to compare the effects of two types of high-intensity interval trai... more The purpose of this study was to compare the effects of two types of high-intensity interval training (HIIT) programs on aerobic and anaerobic capacity of female soccer players. Regional-level female athletes were randomly divided into heart rate-based HIIT (n = 8; age 23.4 ± 1.1 year) and speed-based HIIT groups (n = 8; age 23.4 ± 1.3 year). Athletes trained three days per week for six weeks. Before and after training, each athlete's performance was assessed directly through the Hoff test, 30-15 Intermittent Fitness Test (VIFT), and repeated-sprint ability test (RAST); maximal oxygen consumption (VO 2 max), power and fatigue were estimated indirectly. Both experimental groups improved power, fatigue index and VO 2 max after training (p < 0.05). It was noteworthy that the speed-based group had greater gains in minimal power (effect size (ES): 3.99 vs. 0.75), average power (ES: 2.23 vs. 0.33), and fatigue index (ES: 2.53 vs. 0.17) compared to heart rate-based group (p < 0.05). In conclusion, both heart rate-based and speed-based HIIT induced meaningful improvements in power, VO 2 max, and fatigue index in female soccer players, although the speed-based HIIT group achieved greater gains in power and fatigue index compared to the heart rate-based group.
Journal of strength and conditioning research, Jan 23, 2017
Although plyometric training (PT) improves change of direction (COD) ability, the influence of ag... more Although plyometric training (PT) improves change of direction (COD) ability, the influence of age on COD gains after PT is unclear. Therefore, the aim of this systematic review was to identify the age-related pattern of improvement in COD ability after PT in youths. A computerized search within six databases was performed, selecting studied based on specific inclusion criteria: experimental trials published in English-language journals, PT focused on the lower body, COD ability measurements reported before and after training, and male participants aged 10-to-18 years old. Sixteen articles with a total of 30 effect sizes (ESs) in the experimental groups and 13 ESs in the control groups were included. For the analyses, subjects were catagorized into three age groups: 10 to 12.9 years of age (PRE), 13 to 15.9 years of age (MID) and 16 to 18 years of age (POST). Independent of age, PT improved COD ability in youths (ES = 0.86, time gains [TG = -0.61]). However, a tendency toward greate...
Journal of Human Sport and Exercise, 2015
Asadi, A. (2015). Muscular performance adaptations to short-term plyometric training on sand: inf... more Asadi, A. (2015). Muscular performance adaptations to short-term plyometric training on sand: influence of interday rest. J. Hum. Sport Exerc., 10(3), pp.775-784. The aim of the current investigation was to determine the effects of short-term plyometric depth jump training on sand interposed with 48 hours or 72 hours of rest between training sessions on power type muscular adaptations in recreationally physical active men. Fifteen collegiate physical active men, who were familiar with plyometric exercise, participated in this study and were randomly divided into 2 groups: plyometric training with 48 h (PT48, N=7) and 72 h (PT72, N=8) of rest between training sessions. Pre and post training on sand, participants were measured in vertical jump (VJ), standing long jump (SLJ), agility t Test (TT), 20 and 40 m sprints, and one repetition maximum leg press (1RMLP). The plyometric training program on sand was applied during 6 weeks, 2 sessions per week, with 5 sets of 20 repetitions depth jump exercise from 45 cm box height. After completing 6 weeks training period, the PT48 and PT72 groups showed significant improvement in all performance tests (p<0.05), with statistically significant differences between treatments in TT and 40 m sprint time. With regard to significant differences in TT and 40 m sprint for PT72 compared with PT48 and greater improvements for PT72 in all tests, it can be recommend that coaches, strength and conditioning professionals apply 72 h rest between plyometric training sessions when sand surface was used.
Medicina, 2016
The aim of this study was to compare the effects of 6-week cluster versus traditional plyometric ... more The aim of this study was to compare the effects of 6-week cluster versus traditional plyometric training sets on jumping ability, sprint and agility performance. Materials and methods: Thirteen college students were assigned to a cluster sets group (N = 6) or traditional sets group (N = 7). Both training groups completed the same training program. The traditional group completed five sets of 20 repetitions with 2 min of rest between sets each session, while the cluster group completed five sets of 20 [2 Â 10] repetitions with 30/90s rest each session. Subjects were evaluated for countermovement jump (CMJ), standing long jump (SLJ), t test, 20-m and 40-m sprint test performance before and after the intervention. Results: Both groups had similar improvements (P < 0.05) in CMJ, SLJ, t test, 20-m, and 40-m sprint. However, the magnitude of improvement in CMJ, SLJ and t test was greater for the cluster group (effect size [ES] = 1.24, 0.81 and 1.38, respectively) compared to the traditional group (ES = 0.84, 0.60 and 0.55). Conversely, the magnitude of improvement in 20-m and 40m sprint test was greater for the traditional group (ES = 1.59 and 0.96, respectively) compared to the cluster group (ES = 0.94 and 0.75, respectively). Conclusions: Although both plyometric training methods improved lower body maximalintensity exercise performance, the traditional sets methods resulted in greater adaptations in sprint performance, while the cluster sets method resulted in greater jump and agility adaptations.
Apunts Medicina De L Esport, 2013
Introducció. L'objectiu d'aquest estudi fou examinar l'efecte del test d'una repetició màxima en ... more Introducció. L'objectiu d'aquest estudi fou examinar l'efecte del test d'una repetició màxima en el dany i el dolor muscular en homes entrenats i no entrenats. Mètodes: Participaren a l'estudi 10 homes entrenats (E) i 10 no entrenats (NE). Els subjectes realitzaren un test d'una repetició màxima (1RM) de l'exercici d'esquat, i s'avaluà l'activitat de la creatina cinasa (CK), la concentració de la proteïna C reactiva (PCR) i el dolor muscular (quàdriceps i isquiotibials), a l'inici i al cap de 24, 48 i 72 hores després del test 1RM. Resultats: S'observaren increments significatius de l'activitat de la CK i dolor muscular a les 24, 48 i 72 hores després del test 1RM, així com diferències significatives entre els subjectes entrenats i els no entrenats (p < 0,05). En les concentracions de PCR, ambdós grups mostraren increments significatius en el descans, a les 24, 48 i 72 hores posteriors al test 1RM, i a les 72 hores en comparació amb les 24 hores (p < 0,05). No es detectaren diferències significatives de la concentració de la PCR (p > 0,05) entre els dos grups. Conclusió: En conclusió, el test d'1RM en l'exercici d'esquat (intensitat alta i volum baix) incrementa l'activitat de la CK, la concentració de la PCR en el plasma i el dolor muscular en subjectes entrenats i no entrenats. Es pot observar que el test 1RM pot induir dany muscular, cosa que suposaria un factor negatiu tant per als esportistes com per a la resta d'individus, donat que el dolor muscular s'associa a una disminució del rendiment.
The purpose of this study was to compare the effects of two different warm-up programs consist of... more The purpose of this study was to compare the effects of two different warm-up programs consist of Swiss massage and static-stretching on sprint, explosive performance and lower body flexibility in male college athletes. Twenty male college athletes (of three sport disciplines; indoor soccer, volleyball and basketball) with mean ± SD, age 25.1 ± 9.1 years; height 179.2 ± 6.1 cm; and body mass 66.2 ± 2.3 kg volunteered to participate in this study and were randomly divided into three groups; a) massage group (MG; n=7), static-stretching group (SSG; n=7), and rest group (RG; n=6). The SSG performed static-stretching movements for warming-up, MG performed Swiss massage for warming-up and CG had passive rest. Vertical jump (VJ), 30-m sprint, agility (T test) and sit & reach tests were assessed before (pre) and after (post) each of interventions. Both the SSG and MG showed significant worsening in VJ, sprint time and T test after each of intervention (P < 0.05). But, rest group showed ...
The purpose of this investigation was to compare the effects of six weeks of depth jump and count... more The purpose of this investigation was to compare the effects of six weeks of depth jump and countermovement jump training on agility performance. Eighteen male collegiate students participated in the present study and were randomly assigned to two groups: depth jump (DJ) and countermovement jump (CMJ). Subjects in the DJ and CMJ groups performed 5 sets of 20 repetition jumps from an 18-inch box at two days a week for six weeks. The Illinois agility test and T test were measured a week pre and post six weeks of training. A 2×2 analyses of variance was used for the statistical analyses. Both groups indicated significant improvement than pre training in Illinois agility test and T test (P<0.05); likewise, there were no significant differences between the DJ and CMJ training on agility performance after 6 weeks of training (P>0.05). In conclusion, the DJ and CMJ training improved agility performance, and it can be recommended that, coaches and athletes design these types of plyometric training for improving the ability of acceleration, deceleration and agility movements.
Physical Activity Review, 2015
The purpose of this study was to examine the effects of short-term plyometric depth jump training... more The purpose of this study was to examine the effects of short-term plyometric depth jump training on sand interposed with 48 hours or 72 hours of rest between training sessions on power type muscular adaptations in recreationally physical active men. Fifteen collegiate physical active men, who were familiar with plyometric exercise, participated in this study and were randomly divided into 2 groups: plyometric training with 48 h (PT48, N=7) and 72 h (PT72, N=8) of rest between training sessions. Pre and post training on sand, participants were measured in vertical jump (VJ), standing long jump (SLJ), agility t Test (TT), 20 and 40 m sprints, and one repetition maximum leg press (1RM LP). The plyometric training program on sand was applied during 6 weeks, 2 sessions per week, with 5 sets of 20 repetitions depth jump exercise from 45 cm box height. After completing 6 weeks training period, the PT48 and PT72 groups showed significant improvement in all performance tests (p<0.05), with statistically significant differences between treatments in TT and 40 m sprint time. With regard to significant differences in TT and 40 m sprint for PT72 compared with PT48 and greater improvements for PT72 in all tests, it can be recommend that coaches, strength and conditioning professionals apply 72 h rest between plyometric training sessions when sand surface was used.
INTERNATIONAL SPORTMED JOURNAL
Although a few studies examined the effects of plyometric exercise on cardiovascular responses an... more Although a few studies examined the effects of plyometric exercise on cardiovascular responses and symptoms of muscle damage, the data about the different types of plyometric exercise such as eccentric-based vs. concentric-based exercise is scarce. The purpose of the present investigation was to compare the effects of eccentric and concentric-based plyometric exercises on postexercise systolic (SBP) and diastolic blood pressure (DBP), heart rate (HR) and symptoms of muscle damage. Nineteen healthy men volunteered to participate in this study and were randomly assigned to two groups: Depth jump group (DJG; N=9; Eccentric) and Box jump group (BJG; N=10; Concentric). After plyometric exercise SBP, DBP and HR were measured every 10 min for a period of 90 min post-exercise. Also, muscle soreness, vertical jump and 10-m sprint were assessed at 24, 48, and 72 h postexercise. There were no significant changes in SBP and DBP, and no significant differences between groups in SBP and DBP, whereas the DJG showed greater increases in HR when compared with BJG. Both the groups indicated significant differences in muscle soreness, vertical jump and 10-m sprint at 24, 48 and 72 h post-exercise without significant differences between them. The findings of this study demonstrated that there were no differences in SBP and DBP between groups and both groups showed increases in symptoms of muscle damage following plyometric exercise.
The aim of this investigation was to determine the effectiveness of rating of perceived exertion ... more The aim of this investigation was to determine the effectiveness of rating of perceived exertion (RPE) scale to measure plyometric exercise intensity during low (L), moderate (M) and high (H) intensity. Fourteen physically active students (age; 21±1.1 y, height; 178.7±8.2 cm and body mass; 74.6±9.1 kg) volunteered to participate in this study and performed each intensity once separated with 24 h recovery. The H consisted of 1 set of 5 repetitions at 90% of the subject's vertical jump height (VJH). The M consisted of 10 repetitions at 70% VJT, and the L consisted of 1 set of 15 repetitions at 50% VJH. RPE was measured following the completion each intensity using 0-10 Borg RPE scale. Data was analyzed using repeated measures ANOVA and the level of significant was set at p < 0.05. The results indicated increases in RPE following enhancing exercise intensity (p < 0.05). Performing fewer repetitions at a higher intensity was perceived to be more difficult than performing more repetitions at a lower intensity. The results of the current investigation revealed that the RPE method is effective in monitoring different plyometric exercise and training intensities and it can be recommend that strength and conditioning professionals and athletes use the RPE method based on the effectiveness tool for monitoring their plyometric exercise and training sessions at different intensities.