Kinetic and Kinematic Changes in Vertical Jump in Prepubescent Girls After 10 Weeks of Plyometric Training

2020 ◽  
Vol 32 (2) ◽  
pp. 81-88 ◽  
Author(s):  
K. Katsikari ◽  
Eleni Bassa ◽  
Dimitrios Skoufas ◽  
Savvas Lazaridis ◽  
Christos Kotzamanidis ◽  
...  
Keyword(s):  
Contact Time ◽  
Control Group ◽  
Kinetic Properties ◽  
Plyometric Training ◽  
Countermovement Jump ◽  
Jump Performance ◽  
Squat Jump ◽  
Short Contact Time ◽  
Prolonged Contact ◽  
Drop Jumps

Purpose: To examine the effect of a 10-week plyometric training (PT) on the kinematic and kinetic properties of prepubescent girls during squat jump, countermovement jump, and drop jumps. Methods: Twenty-four untrained girls (aged 9–11 y) were assigned to a training group (TG) and a control group. The TG followed twice a week PT for 10 weeks. Squat jump, countermovement jump, and drop jumps performed from heights of 20, 35, and 50 cm were tested before and after PT. Jump height, kinematic, and kinetic parameters were evaluated using a motion analysis system and a force plate. Results: Jumping height in all jump types increased significantly after PT for the TG (P < .001). After training, the TG presented increased power (P < .001) and knee angular velocity (P < .001), higher knee flexion at the deepest point during the braking phase (P < .001), longer contact time (P < .001), and unchanged stiffness and reaction strength index (P > .05). No differences were observed in the control group (P > .05). Conclusion: These findings indicate that a 10-week PT positively affected jumping performance in prepubescent girls who improved their drop jump performance after training not by adopting a stiff/bouncing jumping style of short contact time and increased stiffness, but a compliant/absorbing style of prolonged contact time.

Plyometric Training in Normobaric Hypoxia improves Jump Performance

2021 ◽  
Author(s):  
Betül Coşkun ◽  
Dicle Aras ◽  
Cengiz Akalan ◽  
Settar Kocak ◽  
Michael J. Hamlin
Keyword(s):  
Sprint Performance ◽  
Normobaric Hypoxia ◽  
Control Group ◽  
Drop Jump ◽  
Plyometric Training ◽  
Countermovement Jump ◽  
Jump Performance ◽  
Squat Jump ◽  
Hypoxic Conditions ◽  
And Function

AbstractStrength training in hypoxia has been shown to enhance hypertrophy and function of skeletal muscle, however, the effects of plyometric training in hypoxia is relatively unknown. Therefore, this study aimed to examine the effects of plyometric training in hypoxia compared to normoxia on body composition, sprint and jump parameters. Twenty-three male physical education students (20.4±2.0 years, mean±SD) participated in the study and were divided into a plyometric training in hypoxia (PTH, n=8), plyometric training in normoxia (PTN, n=7) or control group (C, n=8). The PTH group trained in normobaric hypoxia (approximately 3536 m) 3 days/week for 8 weeks, while the PTN trained in normoxia. PTH induced significant improvements from baseline to post-testing in countermovement-jump (37.8±6.7 cm, 43.4±5.0 cm, p<0.05), squat-jump (35.4±6.2 cm, 41.1±5.7 cm, p<0.05), drop-jump height (32.8±6 cm, 38.1±6 cm, p<0.05) and 20-m sprint performance (3257.1±109.5 ms, 3145.8±83.6 ms, p<0.05); whereas PTN produced significant improvement only in countermovement-jump (37.3±4.8 cm, 40.5±4.5 cm, p<0.05) and 20-m sprint performance (3209.3±76.1 ms, 3126.6±100.4 ms, p<0.05). Plyometric training under hypoxic conditions induces greater improvement in some jump measures (drop-jump and squat-jump) compared to similar training in normoxia.

scholarly journals Effects of Short-Term Plyometric Training on Agility, Jump and Repeated Sprint Performance in Female Soccer Players

2021 ◽  
Vol 18 (5) ◽  
pp. 2274
Author(s):  
Marcin Maciejczyk ◽  
Renata Błyszczuk ◽  
Aleksander Drwal ◽  
Beata Nowak ◽  
Marek Strzała
Keyword(s):  
Physical Performance ◽  
Sprint Performance ◽  
Soccer Players ◽  
Plyometric Training ◽  
Countermovement Jump ◽  
Short Term ◽  
Jump Performance ◽  
Squat Jump ◽  
Repeated Sprint ◽  
Before And After

The aim of the study was to determine the effects of short-term (4 weeks, twice a week: 8 sessions) plyometric training on agility, jump, and repeated sprint performance in female soccer players. The study comprised 17 females performing this sports discipline. The players were randomly divided into two groups: with plyometric training (PLY) and the control (CON). All players followed the same training program, but the PLY group also performed plyometric exercises. Tests used to evaluate physical performance were carried out immediately before and after PLY. After implementing the short PLY training, significant improvement in jump performance (squat jump: p = 0.04, ES = 0.48, countermovement jump: p = 0.009, ES = 0.42) and agility (p = 0.003, ES = 0.7) was noted in the PLY group. In the CON group, no significant (p > 0.05) changes in physical performance were observed. In contrast, PLY did not improve repeated sprint performance (p > 0.05) among female soccer players. In our research, it was shown that PLY can also be effective when performed for only 4 weeks instead of the 6–12 weeks typically applied.

scholarly journals Effects of Slackline Training on Acceleration, Agility, Jump Performance and Postural Control in Youth Soccer Players

2019 ◽  
Vol 67 (1) ◽  
pp. 235-245
Author(s):  
Javier Fernández-Rio ◽  
Luis Santos ◽  
Benjamín Fernández-García ◽  
Roberto Robles ◽  
Iván Casquero ◽  
...  
Keyword(s):  
Postural Control ◽  
Training Program ◽  
Perceived Exertion ◽  
Center Of Pressure ◽  
Training Session ◽  
Soccer Players ◽  
Control Group ◽  
Countermovement Jump ◽  
Jump Performance ◽  
Squat Jump

AbstractThe goal of this study was to assess the effects of a supervised slackline training program in a group of soccer players. Thirty-four male division I under-19 players (16.64 ± 0.81 years) agreed to participate in the study. They were randomly divided into an experimental group (EG) and a control group (CG). The first group (EG) followed a 6-week supervised slackline training program (3 sessions/week; 5-9 min/session), while the CG performed only regular soccer training. Several variables were assessed in all participants: acceleration (20-m sprint test), agility (90º turns test), jump performance (squat jump, countermovement jump), and postural control (Center of Pressure ( CoP) testing: length, area, speed, Xmean, Ymean, Xspeed, Yspeed, Xdeviation, Ydeviation). Ratings of perceived exertion and local muscle ratings of perceived exertions were also recorded after each slackline training session. At post-tests, there was a significant increase only in the EG in acceleration, agility, squat jump and countermovement jump performance, as well as several CoP variables: area in the bipedal support on a firm surface, and length, area and speed in the left leg on a firm surface. The program was rated as “somewhat hard” by the players, while quadriceps, gastrocnemius and tibialis anterior were the most exerted muscles while slacklining. In conclusion, slackline training can be an effective training tool for young, high-level soccer players.

scholarly journals Efecto del entrenamiento pliométrico en la fuerza explosiva de niñas puberes practicantes de voleibol (Effects of plyometric training on explosive strength in pubescent girls volleyball players)

Retos ◽  
2020 ◽  
pp. 41-46
Author(s):  
Gustavo Vilela ◽  
Alexis Caniuqueo-Vargas ◽  
Rodrigo Ramirez-Campillo ◽  
Claudio Hernández-Mosqueira ◽  
Sandro Fernandes Da Silva
Keyword(s):  
Muscle Power ◽  
Lower Limbs ◽  
Control Group ◽  
Plyometric Training ◽  
Squat Jump ◽  
Positive Effects ◽  
Volleyball Players ◽  
Drop Jumps ◽  
Training Post ◽  
Maturity Degree

 El objetivo del estudio fue evaluar los efectos de un programa de entrenamiento pliométrico en la potencia muscular de niñas practicantes de voleibol (n=78; edad = 12,18±1,27 años). Las participantes fueron divididas subdividas de acuerdo con el grado de maduración en: grupo control (GC=48 con grado de maduración 2=11; 3=19; 4=19) y grupo de trabajo (GT=30 con grado de maduración 2=10; 3=10; 4=10). Ambos grupos realizaron 3 sesiones semanales de entrenamiento de voleibol, adicionando 3 sesiones de ejercicios pliométricos a GT que incluyeron salto en zigzag, lineales y profundidad. Para la evaluación pre y post entrenamiento se utilizó test Squat Jump, Saltos Movimiento, Drop Jump y Abalakov. La estadística prueba t student para significancia pre y post entrenamiento (p < 0,05) y también el análisis de la magnitud del efecto. Los resultados no reportaron diferencias significativas post entrenamiento a pesar de registrar pequeños y moderadas magnitudes de efecto. Se concluye que el entrenamiento polimétrico no genero efectos positivos en la saltabilidad de niñas púberes que practican voleibol. Abstract. The aim of this study was to evaluate the effects of plyometric training (PT) on muscle power (PR) of the lower limbs in girls volleyball players aged ( n=78; 12.18 ± 1.27years). Participants were divided according to the degree of maturation into control group (GC = 48 with maturity level 2 = 11; 3 = 19; 4 = 19) and working group (GT = 30 with maturity degree 2 = 10; 3 = 10; 4 = 10). held three sessions per week of volleyball and experimental group - EG n = 24, which held in addition of 3 weekly sessions of volleyball, more 3 weekly sessions of PT that comprised the multi jump, jump over hurdle and drop jumps. For pre- and post-training evaluation test was used Squat Jump, Counter Moviment Jump and Jump Drop Abalakov. The statistical student t test for significance Pre-post (p <0.05) and the analysis of the magnitude of the effect. The results reported no significant differences training post despite posting small to moderate effect sizes. It is concluded that the polymetric training did not generate positive effects on the saltability of pubertal girls who practice volleyball.

Effects of Plyometric Training with Agility Ladder on Physical Fitness in Youth Soccer Players

2021 ◽  
Author(s):  
Alexis Padrón-Cabo ◽  
Miguel Lorenzo-Martínez ◽  
Alexandra Pérez-Ferreirós ◽  
Pablo B. Costa ◽  
Ezequiel Rey
Keyword(s):  
Physical Fitness ◽  
Linear Mixed Model ◽  
Group Analysis ◽  
Training Group ◽  
Soccer Players ◽  
Control Group ◽  
Plyometric Training ◽  
Countermovement Jump ◽  
Squat Jump ◽  
Youth Soccer

AbstractThe aim of this study was to assess the effects of plyometric training with an agility ladder on components of physical fitness in youth soccer players. A total of twenty male under-13 soccer players were randomly assigned to a plyometric training group with an agility ladder (n=10) or a control group (n=10). Before and after training intervention linear sprint test (5 m, 10 m, 20 m), vertical jump ability (squat jump, countermovement jump and countermovement jump with arms), agility test, and slalom dribble test were assessed. The plyometric training with agility ladder was applied two times per week over six weeks. Data were analyzed using linear mixed model. The plyometric training group showed significant improvements (p<0.001) from pre-test to post-test in countermovement jump, countermovement jump with arms, and slalom dribble test. In the control group, no significant enhancements were obtained in all performance tests (p>0.05). The between-group analysis showed significant differences in countermovement jump with arms (p=0.03), but no significant differences (p>0.05) were found in squat jump, countermovement jump, sprint, agility test, and slalom dribble test. In conclusion, the short-term plyometric training with agility ladder seems to be ineffective and not time-efficient to improve physical fitness in youth soccer players. However, the interpretation of these results must be understood within the sample size limitations.

scholarly journals Unilateral Plyometric Training is Superior to Volume-Matched Bilateral Training for Improving Strength, Speed and Power of Lower Limbs in Preadolescent Soccer Athletes

2020 ◽  
Vol 74 (1) ◽  
pp. 161-176
Author(s):  
Vasileios Drouzas ◽  
Christos Katsikas ◽  
Andreas Zafeiridis ◽  
Athanasios Z. Jamurtas ◽  
Gregory C. Bogdanis
Keyword(s):  
Lower Limb ◽  
Training Group ◽  
Sprint Performance ◽  
Lower Limbs ◽  
Control Group ◽  
Plyometric Training ◽  
Countermovement Jump ◽  
Balance Test ◽  
Squat Jump ◽  
Bilateral Training

Abstract This study compared the effects of unilateral and bilateral plyometric training on strength, sprint performance and lower limb power. Sixty-eight preadolescent soccer athletes were randomly assigned to a unilateral plyometric training group (n=23), a bilateral plyometric training group (n=23) and a control group (n=22). Both plyometric training groups trained with equal volumes of unilateral or bilateral exercises for 15 minutes in each session, at which time the control group performed soccer-specific drills. Plyometric exercises were executed twice weekly for 10 weeks during the competitive season. The following tests were performed before and after the intervention: single-leg and double-leg countermovement jump, squat jump, horizontal jumps in different directions, maximal isometric strength of quadriceps and hamstrings, sprint performance, agility and balance. Unilateral plyometric training resulted in greater improvements compared to the control group in the following variables: hamstrings strength (ES: 0.91, p=0.037), 5m sprint time (ES: 0.93, p=0.004), single-leg countermovement jump (ES: 0.90, p=0.006), single- and double-leg squat jump (ES: 0.87, p=0.030 and ES: 0.73, p=0.067, respectively) and single-leg hop performance (ES: 1.01, p=0.004). The only tests where there was an improvement of BPT compared with the CG were the single-leg and double leg SJ (ES: 0.76, p=0.026; ES: 0.70, p=0.050). Quadriceps strength, side hop test, double-leg horizontal jump test, flamingo balance test and modified agility T-test were equally improved in all three groups (p<0.001). In conclusion, unilateral lower-limb plyometric training is more effective in increasing muscle strength and power in preadolescent soccer players when compared to bilateral training or soccer training alone.

scholarly journals VERTICAL JUMPING PERFORMANCE RELATES TO SPRINTING PERFORMANCE OVER SHORT DISTANCES AND DIFFERENT SECTIONS

2021 ◽  
Vol 2 (2021) ◽  
pp. 17-27
Author(s):  
Sebastian Möck ◽  
◽  
René Hartmann ◽  
Klaus Wirth ◽  
◽  
...  
Keyword(s):  
Cycle Performance ◽  
Drop Jump ◽  
Countermovement Jump ◽  
Jump Performance ◽  
Squat Jump ◽  
Mean Values ◽  
Vertical Jumping ◽  
Drop Jumps ◽  
Reaction Forces ◽  
High Level

A high level of sprinting performance is relevant in various sports. Because of the transition of movement patterns in different sprint sections there is a shift in the relevance of speed-strength of the knee and hip extensors, and stretch-shortening cycle performance seems conceivable. Fifty-six physical education students (23.70 ± 3.00 years, 176.9 ± 8.10cm, 74.20 ± 10.30kg) were investigated. They performed sprints up to 30m in which different sections were analyzed and vertical jumps (squat jump, countermovement jump, drop jump from different dropping heights). Vertical jumping tests in squat jump and countermovement jump revealed mean values of 31.95 ± 6.56cm and 34.28 ± 7.47cm, respectively, while the drop jumps showed mean RSI values between 155.11 ± 36.77 and 168.24 ± 36.29 dependent on the dropping height. The sprint test showed a mean performance of 4.464 ± .343s (30m). The correlational analysis showed significant correlations (p < .01) for vertical jumping height with all sprinting sections (r = −.652 to −.834). Drop jump performance also showed significant correlations (p < .01) with all the sections (r = −.379 to −.594). The results let us hypothesize that the observed sample generated similar ground-reaction forces in the sprint and drop jump from a height of 40 cm.

scholarly journals A Training Proposal to Improve Multidirectional Running Technique in Male and Female Handball Players: A Pilot Study

2021 ◽  
Vol 18 (4) ◽  
pp. 2056
Author(s):  
Carmen Ferragut ◽  
Román Pedreira ◽  
José Julio Espina ◽  
Helena Vila
Keyword(s):  
Team Sports ◽  
T Test ◽  
Control Group ◽  
Sprint Training ◽  
Countermovement Jump ◽  
Squat Jump ◽  
Male And Female ◽  
Intervention Protocol ◽  
Post Test ◽  
Experimental Group

Multidirectional running has been described as an important factor in team sports performance. The aim of the present study was to determine changes in T-test, 505 time, 10 m sprint, squat jump (SJ), countermovement jump (CMJ), countermovement jump right leg (CMJRL), and countermovement jump left leg (CMJLL) following exposure to 12 sessions over 4 weeks of a multidirectional running sprint training intervention in male and female handball players. A total of 31 handball players (15 male and 16 female) were recruited for this study and then randomly assigned to an experimental group (EG) or control group (CG). Male EG players showed improvements in 505 Preferred Side (PS) (p ≤ 0.05), 505 Non-Preferred Side (NPS) (p ≤ 0.05), and 10 m sprint (p ≤ 0.05), while female EG players presented statistically significant improvements between pre- and post-test for the T-test (p ≤ 0.05), 505 PS (p ≤ 0.05), 505 NPS (p ≤ 0.05), and 10 m sprint (p ≤ 0.05). No statistically significant pre- and post-test differences were observed in CG (all p ≥ 0.05) or between male and female players. We found an improvement in handball players’ agility and speed of movement following the intervention protocol, suggesting the need to introduce this program into our training sessions. It may also be necessary to select and develop more specific tests in order to evaluate multidirectional work in handball players.

Effects of complex strength training with elastic band program on repeated change of direction in young female handball players: Randomized control trial

2021 ◽  
pp. 174795412110621
Author(s):  
Mehrez Hammami ◽  
Nawel Gaamouri ◽  
Yosser Cherni ◽  
Sabri Gaied ◽  
Mohamed Souhaiel Chelly ◽  
...  
Keyword(s):  
Strength Training ◽  
Young Female ◽  
Control Group ◽  
Countermovement Jump ◽  
Elastic Band ◽  
Squat Jump ◽  
Change Of Direction ◽  
Jump Test ◽  
Back Extensor ◽  
Experimental Group

This study examined the effect of 10-week complex strength training with elastic band program on fitness components in young female handball players. Thirty-eight handball players aged 15.8 ± 0.2 years were randomly assigned to an experimental group or control group. The experimental group performed complex strength training with elastic band twice a week over 10 weeks, which included 8 workshops of progressing set length (number of sets) and band resistance for each specific exercise. Sessions were lasted approximately 35 min. The control group maintained regular in-season training. Tests included handgrip; back extensor; medicine ball throw; 30 m sprint times; Modified Illinois change-of-direction (Illinois-MT); four jump tests (squat jump, countermovement jump, countermovement jump with arms and five jump test; static (stork test) and dynamic (Y balance test) balance; and repeated sprint T-test. The experimental group enhanced all strength performance (handgrip right ( p < 0.001), handgrip left ( p < 0.001), back extensor strength ( p < 0.001) and medicine ball throw ( p < 0.001) compared to the controls); sprint performance (5 m ( p<0.001), 10 m ( p < 0.001), 20 m ( p < 0.001), and 30 m ( p < 0.001)); the change of direction (Illinois-MT ( p < 0.001)); jump performance (squat jump ( p < 0.001), countermovement jump ( p < 0.001), countermovement jump with arms ( p < 0.001), and five jump test ( p < 0.01)); and the repeated sprint T-test scores ( p<0.001in all scores). In contrast, no significant difference in both static and dynamic balance performance between experimental group and control group. Ten weeks of complex strength training with elastic band improve fitness components measures in young female handball players then habitual training.

scholarly journals Impact of acute static-stretching on the optimal height in drop jumps

2014 ◽  
Vol 20 (1) ◽  
pp. 65-70
Author(s):  
Leonardo A. Pasqua ◽  
Nilo M. Okuno ◽  
Mayara V. Damasceno ◽  
Adriano. E. Lima-Silva ◽  
Rômulo Bertuzzi
Keyword(s):  
Contact Time ◽  
Jump Condition ◽  
Static Stretching ◽  
Drop Height ◽  
Plantar Flexors ◽  
Jump Performance ◽  
Physically Active ◽  
Height Determination ◽  
Drop Jumps ◽  
Male Subjects

This study analyzed the effect of static stretching on performance during drop jumps. Furthermore, we investigated if a reduction in drop height would compensate the stretching-caused alterations. Ten physically active male subjects performed drop jumps at four different drop heights without static stretching for the optimal drop height determination. After, they performed drop jumps on two drop heights with static stretching previously. The jump height, contact time and reactive strength index were significantly affected by static stretching. However, only the contact time was significantly improved by the reduction in drop height with previous static stretching. Our results suggest that the decrement in performance after static stretching could be partially compensated by a reduction in drop height, which decreases the contact time near a non-stretching jump condition. This can be explained by the lower landing velocity and, possibly, the smaller reduction in the activation of the plantar flexors muscles. In conclusion, the reduction in drop height seems to be interesting after a static stretching session, aiming to expose the athletes to lower impact forces to maintain jump performance.

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