mohammad hemmatinafar | Shiraz University (original) (raw)
Papers by mohammad hemmatinafar
Journal of the International Society of Sports Nutrition, Apr 11, 2024
Research Square (Research Square), Mar 8, 2024
Journal of the International Society of Sports Nutrition
Hormozgan medical journal, Jun 29, 2021
Background: Box 7 protein (PAX7) and myogenic differentiation (MyoD) proteins are the essential p... more Background: Box 7 protein (PAX7) and myogenic differentiation (MyoD) proteins are the essential proteins to regulate the satellite cell and muscle hypertrophy. Objectives: We aimed to investigate the effect of resistance training (RT) on PAX7 and MyoD in soleus and extensor digitorum longus (EDL) muscles of old rats. Methods: In this experimental study, 12 old female rats were randomly divided into two groups including RT and control groups. The RT program was three days a week for eight weeks, in which the rats climbed a one-meter vertical ladder with 26 steps. The carried weights varied from 50% of body weight in the first week to 100% of body weight in the 8th week. Kolmogorov-Smirnov test and independent sample t test was used for statistical analysis (P≤0.05). Results: MyoD protein in RT group significantly increased in soleus and EDL muscles compared with the control group (P = 0.001). Also, Pax7 significantly increased in the soleus muscle in the RT group compared with control group (P = 0.002); nevertheless, there was no significant difference in Pax7 protein in the EDL muscle between the RT and control groups (P = 0.10). Conclusion: RT can lead to proliferation and renewal of satellite cells in the soleus and EDL muscles by increasing PAX7 and MyoD proteins.
The Open Sports Sciences Journal, Sep 30, 2021
Background: The effectiveness of simulation-based training has been examined in various sports. H... more Background: The effectiveness of simulation-based training has been examined in various sports. However, considering the effect of gender and sport on training, it would be interesting to evaluate simulation-based training in female basketball.
Studies in Medical Sciences, Mar 10, 2019
Journal of Shahid Sadoughi University of Medical Sciences, Apr 24, 2023
The molecular mechanisms of the improvement of exercise on memory are in the aura of ambiguity.Th... more The molecular mechanisms of the improvement of exercise on memory are in the aura of ambiguity.Therefore, the aim of this research was studying the effect of eight weeks of high-intensity intermittent swimming training (HIIST) on the biochemical factors of lipid metabolism and hippocampal memory function of male rats with non-alcoholic steatohepatitis (NASH). Methods: The present study was experimental. 40 male Sprague-Dawley rats were divided into two groups: healthy (n=20) and high-fat HFD (n=20) groups. Rats in the HFD group were fed a high-fat diet for eight weeks with the aim of inducing NASH. After proving the disease in HFD group rats, the remaining rats were randomly divided into four groups: healthy-sedentary (n=9), healthy-swimming (n=9), sedentary disease (n=9) and diseased-swimming (n=9). The exercise groups performed eight weeks of HIIST (three sessions/week, each session lasting 30 minutes). At the end, FNDC5 protein was evaluated by western blot method and brain hippocampal irisin and serum FFA by ELISA method. Memory performance was measured by the water Maz-Morris behavioral test. One-way ANOVA test was used to determine the difference between groups, and Bonferroni's post hoc test was used to determine the difference between two groups (p<0.05). Results: The findings showed that there was a significant difference in the FNDC5 protein and irisin of the brain hippocampus and serum FFA and in memory function variables between the groups (p<0.05). Conclusion: HIIST in NASH model can activate lipid metabolism in the hippocampus of the brain and improve memory function. However, more research is needed in this field.
Background: Efficient exercises for enhancing lipolysis could be implemented in the measures take... more Background: Efficient exercises for enhancing lipolysis could be implemented in the measures taken regarding obesity reduction and the related risk factors. The present study was conducted to compare the response of lipolysis inhibitory and excitatory hormones, including insulin, epinephrine, and glycerol, as index of lipolysis to high-intensity interval resistance exercise (HIIRE) and traditional resistance exercise (TRE) protocols in overweight girls. Methods: This was a kind of acute and semi experimental study, which was performed during the winter of 2019. Eleven overweight young girls with a mean weight of 68.54±4.3 kg participated in this study objectively and voluntarily. The participants took part in HIIRE and TRE programs separately with at least a one-week interval. Blood samples were taken before and immediately after an exercise session in order to measure the levels of epinephrine, insulin, and glycerol. For analysis of the data, we utilized statistical method of paired t-test. Results: Statistical analysis of the data revealed a reduction in the level of insulin (P=0.009) and an increase in that of glycerol (P=0.04) after HIIRE. There were no significant changes in epinephrine following HIIRE (P=0.75) and TRE (P=0.15). Moreover, there were no significant differences concerning the changes of epinephrine (P=0.93), insulin (P=0.15), and glycerol (P=0.13) between HIIRE and TRE protocols (P>0.05). Conclusions: Regarding the decrease in lipolysis inhibitor (insulin) and the increase in glycerol, as an index of adipose lipolysis following HIIRE, it could be recommended as an effective exercise for reducing adiposity.
Journal of advances in medical and biomedical research, Aug 10, 2017
Background and Objective: Exercise training (ET) has cardioprotective effects and can induce new ... more Background and Objective: Exercise training (ET) has cardioprotective effects and can induce new cardiomyocyte formation in physiological cardiac remodeling. Sca-1 is one of the most important surface markers of cardiac stem cells, which repair heart muscle following myocardial infarction (MI). The purpose of this study was to investigate the effects of exercise training intensity on the gene expression of Sca1 in rats with MI. Materials and Methods: Male Wistar rats underwent LAD coronary artery ligation surgery, the occurrence of MI was then confirmed by echocardiography. Four weeks after surgery, the rats with MI were divided randomly into groups including low-intensity training (LIT), moderate intensity training (MIT), high-intensity training (HIT), MI-Sedentary (MI-SED) and a sham group (Sham). Training groups performed exercise training protocols for 6 weeks. The rats were sacrificed after the exercise training interventions and the data obtained from their cardiac tissues were analyzed via one-way ANOVA and Bonferroni tests. Results: Results showed that values of ejection fraction, fractional shortening and Sca-1 mRNA have a significant difference among all groups (P less-than 0.05). Results demonstrated that ejection fraction and fractional shortening values in the exercise training groups increased significantly compared to the MI-SED group. However, their values were significantly lower compared to the Sham group. LIT significantly increased mRNA levels of Sca-1 compared with MI-SED. Conclusion: It seems that low-intensity interval training improves cardiac function and is more effective on the mRNA levels of Sca-1 in rats with MI.
Hormozgan Medical Journal, Sep 29, 2021
Background Muscle atrophy significantly reduces the ability to perform physical tasks leading to ... more Background Muscle atrophy significantly reduces the ability to perform physical tasks leading to decreased independence and increased mortality (1). Skeletal muscle atrophy occurs in pathological (such as cancer and diabetes) and nonpathological (such as inactivity and muscle disuse) conditions. It has been suggested that the mentioned conditions lead to loss of muscle protein, muscle fibrous atrophy, and functional impairment (2). Atrophy is caused by muscle disuse identified by a decrease in the size, weight, and function of skeletal muscle (3). In muscle disuse, because of the imbalance in synthesis and degradation of the protein, a rapid decrease in muscle size has been observed (4). Anabolic pathways include the mechanical stretching pathways (5), the mammalian target of rapamycin (mTOR) (6), the Wnt/βcatenin pathway, and ribosomal biogenesis (7), the betaadrenergic receptor pathway (8), plus some unknown and emerging pathways such as nitric oxide (NO) (9), peroxisome proliferator-activated receptor-gamma coactivator-1 alpha (PGC-1α4) (10), and microRNAs (4). PGC-1α4, one of the isoforms of PGC-1α, promotes muscle growth by activating IGF-1 and inhibiting myostatin (11). Although PGC-1α4 expression decreases in atrophic conditions, its changes in inactivity have not been well established (12). However, the expression of PGC-1α4 in the skeletal muscle of rat causes resistance to cancer and muscle atrophy induced by disuse (13). Research on the preventive factors in muscle atrophy is scarce (14). Some studies have investigated the effective nutritional and pharmacological approaches in the prevention of atrophy. However, physical activity as a non-pharmacological strategy is effective (15). Physical activity before the period of inactivity or sedentary state can reduce the rate of muscle atrophy (16); however, the factors and mechanisms involved are not clear. Several studies have shown the role of aerobic exercise pre-conditioning in reducing atrophy after inactivity. Decreasing the expression of PGC-1α gene and protein induced by inactivity, in mice with five weeks of endurance training was lower than not trained mice (17). Also, PGC-1α4 expression was significantly increased in
International journal of musculoskeletal pain prevention, Mar 1, 2021
This study aimed to investigate the effect of two weeks of vitamin D3 supplementation on some ind... more This study aimed to investigate the effect of two weeks of vitamin D3 supplementation on some indices of Delayed Onset of Muscle Soreness (DOMS) after eccentric exercise. Method and Materials: In this semi experimental study, 20 nonathletic male collegiate students (19.75±1.29 years) participated in the study voluntarily and were divided randomly into two groups of experimental (n=11) and placebo (n=9). The experimental group consumed vitamin D3 (Cholecalciferol) containing 50000 IU while the placebo group took apparently similar capsules containing starch like, two capsules for two weeks. To induce DOMS, participants performed a step protocol that included four sets (5 minutes for each set), with a 1-minute of rest interval between each set using a 46 cm-step. Range of Motion (ROM) of low extremity joints and circumferences, and Visual Analog Scale (VAS were measured before, immediately after (Time 0), and 24 hours (Time 1) and 48 hours (Time 2) after eccentric exercises. Findings: This study showed that thigh Thigh circumference increased following eccentric exercise in the placebo group, while it did not change significantly in the experimental group (p>0.05). There was no significant difference between the two study groups regarding other variables (P>0.05). Vitamin D3 supplementation with the dosage and duration used in the present study reduced the limited symptoms of DOMS. Future studies of longer duration or higher dosage of vitamin D supplementation are recommended. Conclusions: According to the finding of this study, vitamin D3 supplementation could not reduce the limited symptoms significantly. However, future studies are suggested to evaluate the effect of higher dose or longer duration of vitamin D supplementation on DOMS
Nutrients
Background: The improvement of performance and skill indices of volleyball players can affect the... more Background: The improvement of performance and skill indices of volleyball players can affect their success rate. Therefore, the present study aimed to evaluate the effects of acute caffeine supplementation of varied doses on collegiate volleyball players’ specific performance and skills. Method: This research was a randomized, double-blind, crossover design study in which 15 male volleyball players aged 18 to 25 years participated voluntarily. Participants were randomly placed in three different conditions, including 3 mg of caffeine per kilogram of body weight (C3), 6 mg of caffeine per kilogram of body weight (C6), and a placebo (PLA) with a one-week wash-out period between exercise trials. The supplement was taken 60 min before each exercise session. Ball throwing, hand movement speed, agility, Sargent’s jump and handgrip, and attacking and serving skill tests were measured and analyzed to check the performance and skill of the volleyball players. Results: This study showed a si...
Journal of the International Society of Sports Nutrition
Journal of Shahid Sadoughi University of Medical Sciences
Introduction: The molecular mechanisms of the improvement of exercise on memory are in the aura o... more Introduction: The molecular mechanisms of the improvement of exercise on memory are in the aura of ambiguity.Therefore, the aim of this research was studying the effect of eight weeks of high-intensity intermittent swimming training (HIIST) on the biochemical factors of lipid metabolism and hippocampal memory function of male rats with non-alcoholic steatohepatitis (NASH). Methods: The present study was experimental. 40 male Sprague-Dawley rats were divided into two groups: healthy (n=20) and high-fat HFD (n=20) groups. Rats in the HFD group were fed a high-fat diet for eight weeks with the aim of inducing NASH. After proving the disease in HFD group rats, the remaining rats were randomly divided into four groups: healthy-sedentary (n=9), healthy-swimming (n=9), sedentary disease (n=9) and diseased-swimming (n=9). The exercise groups performed eight weeks of HIIST (three sessions/week, each session lasting 30 minutes). At the end, FNDC5 protein was evaluated by western blot method a...
International journal of musculoskeletal pain prevention, Mar 1, 2021
This study aimed to investigate the effect of two weeks of vitamin D3 supplementation on some ind... more This study aimed to investigate the effect of two weeks of vitamin D3 supplementation on some indices of Delayed Onset of Muscle Soreness (DOMS) after eccentric exercise. Method and Materials: In this semi experimental study, 20 nonathletic male collegiate students (19.75±1.29 years) participated in the study voluntarily and were divided randomly into two groups of experimental (n=11) and placebo (n=9). The experimental group consumed vitamin D3 (Cholecalciferol) containing 50000 IU while the placebo group took apparently similar capsules containing starch like, two capsules for two weeks. To induce DOMS, participants performed a step protocol that included four sets (5 minutes for each set), with a 1-minute of rest interval between each set using a 46 cm-step. Range of Motion (ROM) of low extremity joints and circumferences, and Visual Analog Scale (VAS were measured before, immediately after (Time 0), and 24 hours (Time 1) and 48 hours (Time 2) after eccentric exercises. Findings: This study showed that thigh Thigh circumference increased following eccentric exercise in the placebo group, while it did not change significantly in the experimental group (p>0.05). There was no significant difference between the two study groups regarding other variables (P>0.05). Vitamin D3 supplementation with the dosage and duration used in the present study reduced the limited symptoms of DOMS. Future studies of longer duration or higher dosage of vitamin D supplementation are recommended. Conclusions: According to the finding of this study, vitamin D3 supplementation could not reduce the limited symptoms significantly. However, future studies are suggested to evaluate the effect of higher dose or longer duration of vitamin D supplementation on DOMS
Razi Journal of Medical Sciences, Apr 10, 2021
هديكچ مز ي فده و هن : يمسيلگرپيه رد يمهم شقن نيتكنوپيدآ ل ، ي لوپ ي ز مسيناكم و دراد يباهتلا ياه ... more هديكچ مز ي فده و هن : يمسيلگرپيه رد يمهم شقن نيتكنوپيدآ ل ، ي لوپ ي ز مسيناكم و دراد يباهتلا ياه . مسيناكم و نيتكنوـپيدآ نيـب طاـبترا دـنناوتب هك يياه نيلوسنا تمواقم لاعف هب خساپ رد ار ي ت اه ي شزرو ي هدنام يقاب مهبم زونه ،دنهد حيضوت دنا . ا فده نيا ز هعلاطم ، عت يي ن ثأـت ي ر هـتفه شـش رـمت ي ن بوانت ي لااب تدش اب ) HIIT ( طس رب و امسلاپ ح يي دآ ي تکنوپ ي تمواقم ،ن و ساسح ي لوسنا ت ي ن ي اتب لولس درکلمع و غ ناوج نادرم رد ي ر لاعف دوب . سررب شور ي : هب ا ي روظنم ن ، ١٨ وجشناد زا رفن ي ب نا ه ا رد هنابلطواد تروص ي ن شهوژپ تکرش دندرک تروص هب و فداصت ي ـ برجت هورـگ ود هـب ي ) ٩ n= ، نـس : ٤١ / ١ ± ٣٣ / ٢٤ لاـس دـق ، : ٩١ / ٤ ± ٢٢ / ١٧٦ يتناـس رـتم نزو ، : ٥٩ / ٦ ± ٢٧ / ٧٢ وـليك مرـگ ( لرـتنک و ) ٩ n= ، نـس : ٠١ / ٢ ± ٢٧ / ٢٣ لاـس ، دق : ٨٨ / ٦ ± ٢٢ / ١٨٠ يتناس رتم نزو ، : ٢٣ / ٧ ± ٢٧ / ٧٦ وليك مرگ ( سقت ي دندش م . برجت هورگ ي تدم هب شش مت لکتورپ هتفه رد هسلج هس و هتفه ر ي ـ ن ي
Journal of the International Society of Sports Nutrition, Apr 11, 2024
Research Square (Research Square), Mar 8, 2024
Journal of the International Society of Sports Nutrition
Hormozgan medical journal, Jun 29, 2021
Background: Box 7 protein (PAX7) and myogenic differentiation (MyoD) proteins are the essential p... more Background: Box 7 protein (PAX7) and myogenic differentiation (MyoD) proteins are the essential proteins to regulate the satellite cell and muscle hypertrophy. Objectives: We aimed to investigate the effect of resistance training (RT) on PAX7 and MyoD in soleus and extensor digitorum longus (EDL) muscles of old rats. Methods: In this experimental study, 12 old female rats were randomly divided into two groups including RT and control groups. The RT program was three days a week for eight weeks, in which the rats climbed a one-meter vertical ladder with 26 steps. The carried weights varied from 50% of body weight in the first week to 100% of body weight in the 8th week. Kolmogorov-Smirnov test and independent sample t test was used for statistical analysis (P≤0.05). Results: MyoD protein in RT group significantly increased in soleus and EDL muscles compared with the control group (P = 0.001). Also, Pax7 significantly increased in the soleus muscle in the RT group compared with control group (P = 0.002); nevertheless, there was no significant difference in Pax7 protein in the EDL muscle between the RT and control groups (P = 0.10). Conclusion: RT can lead to proliferation and renewal of satellite cells in the soleus and EDL muscles by increasing PAX7 and MyoD proteins.
The Open Sports Sciences Journal, Sep 30, 2021
Background: The effectiveness of simulation-based training has been examined in various sports. H... more Background: The effectiveness of simulation-based training has been examined in various sports. However, considering the effect of gender and sport on training, it would be interesting to evaluate simulation-based training in female basketball.
Studies in Medical Sciences, Mar 10, 2019
Journal of Shahid Sadoughi University of Medical Sciences, Apr 24, 2023
The molecular mechanisms of the improvement of exercise on memory are in the aura of ambiguity.Th... more The molecular mechanisms of the improvement of exercise on memory are in the aura of ambiguity.Therefore, the aim of this research was studying the effect of eight weeks of high-intensity intermittent swimming training (HIIST) on the biochemical factors of lipid metabolism and hippocampal memory function of male rats with non-alcoholic steatohepatitis (NASH). Methods: The present study was experimental. 40 male Sprague-Dawley rats were divided into two groups: healthy (n=20) and high-fat HFD (n=20) groups. Rats in the HFD group were fed a high-fat diet for eight weeks with the aim of inducing NASH. After proving the disease in HFD group rats, the remaining rats were randomly divided into four groups: healthy-sedentary (n=9), healthy-swimming (n=9), sedentary disease (n=9) and diseased-swimming (n=9). The exercise groups performed eight weeks of HIIST (three sessions/week, each session lasting 30 minutes). At the end, FNDC5 protein was evaluated by western blot method and brain hippocampal irisin and serum FFA by ELISA method. Memory performance was measured by the water Maz-Morris behavioral test. One-way ANOVA test was used to determine the difference between groups, and Bonferroni's post hoc test was used to determine the difference between two groups (p<0.05). Results: The findings showed that there was a significant difference in the FNDC5 protein and irisin of the brain hippocampus and serum FFA and in memory function variables between the groups (p<0.05). Conclusion: HIIST in NASH model can activate lipid metabolism in the hippocampus of the brain and improve memory function. However, more research is needed in this field.
Background: Efficient exercises for enhancing lipolysis could be implemented in the measures take... more Background: Efficient exercises for enhancing lipolysis could be implemented in the measures taken regarding obesity reduction and the related risk factors. The present study was conducted to compare the response of lipolysis inhibitory and excitatory hormones, including insulin, epinephrine, and glycerol, as index of lipolysis to high-intensity interval resistance exercise (HIIRE) and traditional resistance exercise (TRE) protocols in overweight girls. Methods: This was a kind of acute and semi experimental study, which was performed during the winter of 2019. Eleven overweight young girls with a mean weight of 68.54±4.3 kg participated in this study objectively and voluntarily. The participants took part in HIIRE and TRE programs separately with at least a one-week interval. Blood samples were taken before and immediately after an exercise session in order to measure the levels of epinephrine, insulin, and glycerol. For analysis of the data, we utilized statistical method of paired t-test. Results: Statistical analysis of the data revealed a reduction in the level of insulin (P=0.009) and an increase in that of glycerol (P=0.04) after HIIRE. There were no significant changes in epinephrine following HIIRE (P=0.75) and TRE (P=0.15). Moreover, there were no significant differences concerning the changes of epinephrine (P=0.93), insulin (P=0.15), and glycerol (P=0.13) between HIIRE and TRE protocols (P>0.05). Conclusions: Regarding the decrease in lipolysis inhibitor (insulin) and the increase in glycerol, as an index of adipose lipolysis following HIIRE, it could be recommended as an effective exercise for reducing adiposity.
Journal of advances in medical and biomedical research, Aug 10, 2017
Background and Objective: Exercise training (ET) has cardioprotective effects and can induce new ... more Background and Objective: Exercise training (ET) has cardioprotective effects and can induce new cardiomyocyte formation in physiological cardiac remodeling. Sca-1 is one of the most important surface markers of cardiac stem cells, which repair heart muscle following myocardial infarction (MI). The purpose of this study was to investigate the effects of exercise training intensity on the gene expression of Sca1 in rats with MI. Materials and Methods: Male Wistar rats underwent LAD coronary artery ligation surgery, the occurrence of MI was then confirmed by echocardiography. Four weeks after surgery, the rats with MI were divided randomly into groups including low-intensity training (LIT), moderate intensity training (MIT), high-intensity training (HIT), MI-Sedentary (MI-SED) and a sham group (Sham). Training groups performed exercise training protocols for 6 weeks. The rats were sacrificed after the exercise training interventions and the data obtained from their cardiac tissues were analyzed via one-way ANOVA and Bonferroni tests. Results: Results showed that values of ejection fraction, fractional shortening and Sca-1 mRNA have a significant difference among all groups (P less-than 0.05). Results demonstrated that ejection fraction and fractional shortening values in the exercise training groups increased significantly compared to the MI-SED group. However, their values were significantly lower compared to the Sham group. LIT significantly increased mRNA levels of Sca-1 compared with MI-SED. Conclusion: It seems that low-intensity interval training improves cardiac function and is more effective on the mRNA levels of Sca-1 in rats with MI.
Hormozgan Medical Journal, Sep 29, 2021
Background Muscle atrophy significantly reduces the ability to perform physical tasks leading to ... more Background Muscle atrophy significantly reduces the ability to perform physical tasks leading to decreased independence and increased mortality (1). Skeletal muscle atrophy occurs in pathological (such as cancer and diabetes) and nonpathological (such as inactivity and muscle disuse) conditions. It has been suggested that the mentioned conditions lead to loss of muscle protein, muscle fibrous atrophy, and functional impairment (2). Atrophy is caused by muscle disuse identified by a decrease in the size, weight, and function of skeletal muscle (3). In muscle disuse, because of the imbalance in synthesis and degradation of the protein, a rapid decrease in muscle size has been observed (4). Anabolic pathways include the mechanical stretching pathways (5), the mammalian target of rapamycin (mTOR) (6), the Wnt/βcatenin pathway, and ribosomal biogenesis (7), the betaadrenergic receptor pathway (8), plus some unknown and emerging pathways such as nitric oxide (NO) (9), peroxisome proliferator-activated receptor-gamma coactivator-1 alpha (PGC-1α4) (10), and microRNAs (4). PGC-1α4, one of the isoforms of PGC-1α, promotes muscle growth by activating IGF-1 and inhibiting myostatin (11). Although PGC-1α4 expression decreases in atrophic conditions, its changes in inactivity have not been well established (12). However, the expression of PGC-1α4 in the skeletal muscle of rat causes resistance to cancer and muscle atrophy induced by disuse (13). Research on the preventive factors in muscle atrophy is scarce (14). Some studies have investigated the effective nutritional and pharmacological approaches in the prevention of atrophy. However, physical activity as a non-pharmacological strategy is effective (15). Physical activity before the period of inactivity or sedentary state can reduce the rate of muscle atrophy (16); however, the factors and mechanisms involved are not clear. Several studies have shown the role of aerobic exercise pre-conditioning in reducing atrophy after inactivity. Decreasing the expression of PGC-1α gene and protein induced by inactivity, in mice with five weeks of endurance training was lower than not trained mice (17). Also, PGC-1α4 expression was significantly increased in
International journal of musculoskeletal pain prevention, Mar 1, 2021
This study aimed to investigate the effect of two weeks of vitamin D3 supplementation on some ind... more This study aimed to investigate the effect of two weeks of vitamin D3 supplementation on some indices of Delayed Onset of Muscle Soreness (DOMS) after eccentric exercise. Method and Materials: In this semi experimental study, 20 nonathletic male collegiate students (19.75±1.29 years) participated in the study voluntarily and were divided randomly into two groups of experimental (n=11) and placebo (n=9). The experimental group consumed vitamin D3 (Cholecalciferol) containing 50000 IU while the placebo group took apparently similar capsules containing starch like, two capsules for two weeks. To induce DOMS, participants performed a step protocol that included four sets (5 minutes for each set), with a 1-minute of rest interval between each set using a 46 cm-step. Range of Motion (ROM) of low extremity joints and circumferences, and Visual Analog Scale (VAS were measured before, immediately after (Time 0), and 24 hours (Time 1) and 48 hours (Time 2) after eccentric exercises. Findings: This study showed that thigh Thigh circumference increased following eccentric exercise in the placebo group, while it did not change significantly in the experimental group (p>0.05). There was no significant difference between the two study groups regarding other variables (P>0.05). Vitamin D3 supplementation with the dosage and duration used in the present study reduced the limited symptoms of DOMS. Future studies of longer duration or higher dosage of vitamin D supplementation are recommended. Conclusions: According to the finding of this study, vitamin D3 supplementation could not reduce the limited symptoms significantly. However, future studies are suggested to evaluate the effect of higher dose or longer duration of vitamin D supplementation on DOMS
Nutrients
Background: The improvement of performance and skill indices of volleyball players can affect the... more Background: The improvement of performance and skill indices of volleyball players can affect their success rate. Therefore, the present study aimed to evaluate the effects of acute caffeine supplementation of varied doses on collegiate volleyball players’ specific performance and skills. Method: This research was a randomized, double-blind, crossover design study in which 15 male volleyball players aged 18 to 25 years participated voluntarily. Participants were randomly placed in three different conditions, including 3 mg of caffeine per kilogram of body weight (C3), 6 mg of caffeine per kilogram of body weight (C6), and a placebo (PLA) with a one-week wash-out period between exercise trials. The supplement was taken 60 min before each exercise session. Ball throwing, hand movement speed, agility, Sargent’s jump and handgrip, and attacking and serving skill tests were measured and analyzed to check the performance and skill of the volleyball players. Results: This study showed a si...
Journal of the International Society of Sports Nutrition
Journal of Shahid Sadoughi University of Medical Sciences
Introduction: The molecular mechanisms of the improvement of exercise on memory are in the aura o... more Introduction: The molecular mechanisms of the improvement of exercise on memory are in the aura of ambiguity.Therefore, the aim of this research was studying the effect of eight weeks of high-intensity intermittent swimming training (HIIST) on the biochemical factors of lipid metabolism and hippocampal memory function of male rats with non-alcoholic steatohepatitis (NASH). Methods: The present study was experimental. 40 male Sprague-Dawley rats were divided into two groups: healthy (n=20) and high-fat HFD (n=20) groups. Rats in the HFD group were fed a high-fat diet for eight weeks with the aim of inducing NASH. After proving the disease in HFD group rats, the remaining rats were randomly divided into four groups: healthy-sedentary (n=9), healthy-swimming (n=9), sedentary disease (n=9) and diseased-swimming (n=9). The exercise groups performed eight weeks of HIIST (three sessions/week, each session lasting 30 minutes). At the end, FNDC5 protein was evaluated by western blot method a...
International journal of musculoskeletal pain prevention, Mar 1, 2021
This study aimed to investigate the effect of two weeks of vitamin D3 supplementation on some ind... more This study aimed to investigate the effect of two weeks of vitamin D3 supplementation on some indices of Delayed Onset of Muscle Soreness (DOMS) after eccentric exercise. Method and Materials: In this semi experimental study, 20 nonathletic male collegiate students (19.75±1.29 years) participated in the study voluntarily and were divided randomly into two groups of experimental (n=11) and placebo (n=9). The experimental group consumed vitamin D3 (Cholecalciferol) containing 50000 IU while the placebo group took apparently similar capsules containing starch like, two capsules for two weeks. To induce DOMS, participants performed a step protocol that included four sets (5 minutes for each set), with a 1-minute of rest interval between each set using a 46 cm-step. Range of Motion (ROM) of low extremity joints and circumferences, and Visual Analog Scale (VAS were measured before, immediately after (Time 0), and 24 hours (Time 1) and 48 hours (Time 2) after eccentric exercises. Findings: This study showed that thigh Thigh circumference increased following eccentric exercise in the placebo group, while it did not change significantly in the experimental group (p>0.05). There was no significant difference between the two study groups regarding other variables (P>0.05). Vitamin D3 supplementation with the dosage and duration used in the present study reduced the limited symptoms of DOMS. Future studies of longer duration or higher dosage of vitamin D supplementation are recommended. Conclusions: According to the finding of this study, vitamin D3 supplementation could not reduce the limited symptoms significantly. However, future studies are suggested to evaluate the effect of higher dose or longer duration of vitamin D supplementation on DOMS
Razi Journal of Medical Sciences, Apr 10, 2021
هديكچ مز ي فده و هن : يمسيلگرپيه رد يمهم شقن نيتكنوپيدآ ل ، ي لوپ ي ز مسيناكم و دراد يباهتلا ياه ... more هديكچ مز ي فده و هن : يمسيلگرپيه رد يمهم شقن نيتكنوپيدآ ل ، ي لوپ ي ز مسيناكم و دراد يباهتلا ياه . مسيناكم و نيتكنوـپيدآ نيـب طاـبترا دـنناوتب هك يياه نيلوسنا تمواقم لاعف هب خساپ رد ار ي ت اه ي شزرو ي هدنام يقاب مهبم زونه ،دنهد حيضوت دنا . ا فده نيا ز هعلاطم ، عت يي ن ثأـت ي ر هـتفه شـش رـمت ي ن بوانت ي لااب تدش اب ) HIIT ( طس رب و امسلاپ ح يي دآ ي تکنوپ ي تمواقم ،ن و ساسح ي لوسنا ت ي ن ي اتب لولس درکلمع و غ ناوج نادرم رد ي ر لاعف دوب . سررب شور ي : هب ا ي روظنم ن ، ١٨ وجشناد زا رفن ي ب نا ه ا رد هنابلطواد تروص ي ن شهوژپ تکرش دندرک تروص هب و فداصت ي ـ برجت هورـگ ود هـب ي ) ٩ n= ، نـس : ٤١ / ١ ± ٣٣ / ٢٤ لاـس دـق ، : ٩١ / ٤ ± ٢٢ / ١٧٦ يتناـس رـتم نزو ، : ٥٩ / ٦ ± ٢٧ / ٧٢ وـليك مرـگ ( لرـتنک و ) ٩ n= ، نـس : ٠١ / ٢ ± ٢٧ / ٢٣ لاـس ، دق : ٨٨ / ٦ ± ٢٢ / ١٨٠ يتناس رتم نزو ، : ٢٣ / ٧ ± ٢٧ / ٧٦ وليك مرگ ( سقت ي دندش م . برجت هورگ ي تدم هب شش مت لکتورپ هتفه رد هسلج هس و هتفه ر ي ـ ن ي