Relative power of the lower limbs in drop jump (original) (raw)
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The Journal of Strength and Conditioning Research, 2004
Kollias, I., V. Panoutsakopoulos, and G. Papaiakovou. Comparing jumping ability among athletes of various sports: Vertical drop jumping from 60 centimeters. J. Strength Cond. Res. 18(3):546-550. 2004.-Drop jumping performance (DJP) is of high importance in order to achieve sporting performance in both team and individual sports. The purpose of the present study was to compare DJP among athletes from various sports. One hundred thirty-eight male athletes (age: 22.3 Ϯ 3.6 years, body height: 1.87 Ϯ 0.08 m, body mass: 81.8 Ϯ 10.8 kg) from 6 different sports performed drop jumps from 60 cm (DJ60) on a force plate. Results revealed that volleyball players jumped higher (p Ͻ 0.001) than other athletes. However, track and field athletes produced higher peak force and higher power output using a shorter upward phase (p Ͻ 0.001). Further examination using principal components analysis (PCA) revealed that team sport athletes and single scull rowers exhibited DJP utilizing force and time parameters differently than track and field athletes. Conclusively, DJP was different among athletes of various sports. Furthermore, PCA can be a useful method for evaluating the above mentioned differences and for monitoring drop jumping training programs.
Journal of Education and Training Studies
The aim of this investigation is to compare velocity and power variables during loaded-squat jump (SJLoaded) exercise of national athletes dealing with different sports branches and to identify whether velocity and power parameters become different or not according to branches. In accordance with this purpose, a total of 36 national athletes (age: 20.3±1.68 years; height: 173.5±6.46 cm; weight: 72.3±10.29 kg) composed of 12 wrestlers (age: 19.5±.90 years; height: 172.3±6.19 cm; weight: 75.5±13.9 kg), 12 arm wrestlers (age: 20.5±2.02 years; height: 174.7±4.76 cm; weight: 72.6±8.31 kg) and 12 kickboxers (age: 20.7±1.81 years; height: 173.5±8.29 cm; weight: 68.9±6.94 kg) dealing with different sports branches have voluntarily participated in this study. For identifying velocity and power parameters, SJLoaded exercise was executed with an external load that corresponds to 40% of body weights of the athletes by utilizing an isoinertial velocity transducer (T-Force dynamic measurement sys...
Influence of Plyometrics on Jump Capabilities in Technical and Aesthetical Sports
Acta Facultatis Educationis Physicae Universitatis Comenianae, 2017
Summary The aim of the study was to examine the effect of plyometric exercises on explosive strength of lower extremities in girls performing of technical and aesthetical sports. Experiment was carried out on three groups; artistic gymnasts (VG, n = 15; age = 12.4 ± 0.7 years), fitness girls (VF, n = 15; age = 13.8 ± 1.9 years) and dancers (VD, n = 15; age = 13.8 ± 2 years). To check, the control group of general population was involved in the study (VK, n = 15; age = 13.9 ± 1.5 years). Following tests on jump ergometer Fitro Jumper were carried out at the beginning and at the end of experimental period: countermovement jump without and with arms swing and 10- second series of repeated vertical jumps. Plyometric program consisted of two plyometric units a week during thirty weeks. The results show that higher improvement in all evaluated tests achieved the group of fitness. In the countermovement jump without arm swing was observed improvement height of the jump 3.4 ± 1.4 cm (p ˂ 0....
Journal of Education and Training Studies, 2017
The purpose of this study was to compare power, velocity and force parameters during loaded squat jump (SJ) exercise in the handball and arm wrestling players. In accordance with this purpose, ten arm wrestling athletes from the Turkish National Team (age: 20,7 ± 3,05 years; height: 175,2 ± 5,55 cm; weight: 71,7 ± 8,17 kg) who had ranks in competitions at World and Europe Am Wrestling Championships and ten handball players (age: 23,0 ± 4,00 years; height: 182,3 ± 6,06 cm; weight: 77,8 ± 11,3 kg) who competed at Turkish handball 1st league participated voluntarily in this study. Subjects were performed loaded SJ exercise using a load equals to 40 % of their body weight and obtained the power, velocity and force values using an isoinertial measurement system (T-Force Dynamic Measurement System). For data analysis, descriptive statistic and Mann Whitney - U analyses were used. According to analysis results, there was a statistically significant difference between jump velocity during l...
Plyometric Jumping Performances of Male and Female Gymnasts From Different Heights
Journal of Strength and Conditioning Research, 2012
The objective of this study was to investigate and compare the factors influencing plyometric jumping performance between well-trained gymnasts and a control group. 76 gymnasts and 91 moderately active subjects volunteered in this study. Drop jumps (DJ) were performed from 20, 40, 60, 80 and 100 cm heights. Flight Time (FT) and contact Time (CT) were recorded using contact mat. Flight-Contact ratio (FC) and Bosco Expression (BE) were calculated. Male gymnasts scored similar FT to their controls, whereas female gymnasts had significantly longer FT compared to their peers. The gymnasts obtained significantly shorter CT than their control groups, whereas their FC ratios were significantly higher and increased when the height of the drops was close to 60 cm. Moreover, Gymnasts’ BE was greater in comparison to their respective control groups independently of the drop height. The height of the drop that produced the best FC and BE varied between the groups. The best performances were obtained between 40 and 60 cm drop height for both groups. Females control group showed a trend toward a continuing decline with the increase of the drop’s height. The best gymnasts (finalists at World Championships) obtained their best performance at 80 cm drop. FT is the less discriminating factor distinguishing gymnasts’ DJ performances. Considering CT, FC and BE results all together could better profile the gymnasts rather than taken separately. BE was shown to be more sensitive to the increase in FT; we suggest BE as the best criteria to assess the appropriate drop height for plyometric training purposes in gymnasts as it has been significantly correlated to FT.
Maximal Muscular Strength as a Predictor of Optimum Drop Height
Facta Universitatis, Series: Physical Education and Sport, 2019
The first goal of the study was to examine the relationship between maximum muscle strength and optimal drop height (DH opt), while the second goal was to examine the relationship between regression models for the prediction of DH opt and DH opt determined by variable H. A total of 30 respondents, students of the Faculty of Sport and Physical Education participated in the experiment. During the experiment, eight altitudes were randomized in the range of 0.12 to 0.82 m. The instruction was to achieve a higher jump, with a shorter duration of rebound. A positive statistically significant correlation between DH opt determined by the prediction method with 1 RM / BM 0.67 and MDS (p<0.05) was calculated. When computing the DH opt connection determined by the dialing method with the maximum muscle strength of the participants, no statistically significant correlation was obtained, but there is a positive trend. Determined by the prediction method DH opt is (0.47±0.17 m) and using the regression model with 1 RM/BM 0.67 it is (0.47±0.07 m) and with MDS (0.48±0.06 m). In order to explain the high relationship between the models, it should be noted that the muscles of the knee joint have a more important role in motor tasks performed at higher intensity like during the drop jump. With this in mind, DH opt in the jump can be determined depending on the neuromuscular capacity to generate the maximum muscle strength of the knee in order to use the optimal intensity within plyometric training.
Effect of Additional Load on Power Output during Drop Jump Training
Journal of Human Kinetics, 2010
Plyometrics can be an effective way of improving power performance in many sports. The purpose of this study was to examine the effects of additional loading on power during drop jump training. Forty-two untrained physical education students with plyometric training background participated in a six-week training 3 times a week. Subjects were randomized to one of three training groups: without (FREE) and with a weight vest (VEST; 5% body weight), and a control group (CON)
Strength and vertical jumping performance characteristics
2014
The constructed 3D model of the lower part of human body for the simulation of high jump enables to investigate not only parameters of the jump but to analyses the forces acting in muscles and joints as well. The model enables determining the most important muscles for the jump performance and sequentially to make recommendations for the sportsmen seeking the jump height. The developed methodology can be applied for the analysis of other type movements in sports.
isara solutions, 2014
Background: The purpose of the study was to investigate the effect of Plyometric Training and weight training on vertical jumping ability of Physical education students. Methods: For this study twenty four male B.P.E. Ist years students of Department of Physical Education B.H.U. were selected. The subjects were selected randomly and divided into three groups. Each group was consisted of eight students. Group A students were given plyometric training and group B students were given weight training, group C students were served as control group. Keeping the feasibility criterion in mind. For the purpose of this study, random group design was employed. Group A and group B acted as experimental group. Group C served as control group. The test requiring minimum possible equipment and space, least time consuming and administratively simple were aimed at to measure the jumping ability of B.P.E. 1 year students. Jump and Reach, Approach Jump and Reach. The jumps performed by the subject were recorded in centimeters Results: The finding of the study reveals that there is significant difference between experimental groups and control group during post test in jump and reach. Jump and reach ability required for the higher performance in the volleyball, basketball, handball etc. The performance of pre-test period is not showing significant difference between experimental groups and control group. In the case of control group there were less significant improvement observed in the performance in the pre-test and post-test. The little improvement observed may have been due to their participating in daily physical education schedule. It has been also observed during the testing period of post-test, experimental group performed better movement quality than the control group. The development of jumping skill's quality, which learned by the subject during performing the plyometric exercise in experimental period also may be reason to differentiate significantly experimental group to control group
Pedagogy of Physical Culture and Sports
Background and Study Aim. Athletic jumps are specific cyclically-acyclic movements that despite the good performance of the techniques require from competitors a high level of motor, specific-motor and functional abilities. The aim of this study was to examine the response effect of vertical and horizontal plyometric training on explosive capacity and kinetic variables in long jump athletes. Material and Methods. The participants of this study were twenty professional jumpers (22.5 ± 4.2 years; 178.4 ± 9.8 cm; 70.3 ± 7.6 kg) who were divided into two groups: experimental (plyometric training) and control (standard training). They participated in the last track and field championship in country, moreover, three of them participated in the last Asian games, and one athlete participated in the world track and field championship. The experiments were conducted on June-July 2019 in twenty professional athletes. All tests were performed after a standard warm up protocol. The place of came...