Jump Performance In Soccer Players Research Articles

Weekly Variations of Short-Duration Maximal Jumping Performance in Soccer Players: Exploring Relationships With Accumulated Training Load and Match Demands.

Purpose: The aim of this study was 2-fold: (1) to analyze variations of short-duration maximal jumping performance in players exposed to a match and those who were not and (2) to analyze the relationships between changes in the short-duration maximal jumping performance and different accumulated training load and match demands measures.Methods: Twenty-four professional soccer players (age: 20.3 ± 1.7 years) were monitored daily for their training load and match demands over 6 weeks. In addition, they performed a weekly short-duration maximal jumping performance test (72 h after the last match).Results: Negative moderate correlations were found between percentage of change of countermovement jump (CMJ) height and Acummulated training load (ATL) of total distance (TD), high metabolic load (HML), accelerations (ACC), and decelerations (DEC) (r = −0.38, p = 0.004; r = −0.33, p = 0.013; r = −0.39, p = 0.003; and r = −0.30, p = 0.026). No correlations were found for match load (ML). TD, HML, ACC, and DCC (r = 0.27, r = 0.25, r = 0.31, and r = 0.22, respectively) were used to predict the percentage of change of CMJ height.Conclusion: Match participation has negative effects on CMJ performance. The ATL of HML, ACC, DCC, and TD have a significant influence on both CMJ measures changes. Also, the ATL values of those metrics are the best predictors of the percentage changes of CMJ performance.

Increases In Lean Body Mass Do Not Negatively Affect Broad Jump Performance In Soccer Players

INTRODUCTION: There is an unfounded dogma that suggests that an increase in body mass would interfere with broad jump performance. The hypothesis is that a gain in body mass obtain from resistance training (RT) will not be deleterious to performance. PURPOSE: The purpose of this study was to measure the effect of a RT program and the resulting gain in lean mass on broad jump testing results in soccer players. METHODS: Fifteen male soccer players from a U-19 team of the Elite Ivory Coast Training Academy (age:15.8 ± 1.42) took part in a RT program intervention twice a week, over the course of 12 weeks, while maintaining their regular soccer training program. The RT program included three different full-body workouts, with percentage of Maximum Repetition (RM) ranging from 75% to 87% of 1 RM. Participant bodyweight (BW) was recorded and bodyfat percentage (BF%) was measured using an Harpenden caliper and the Durin & Ramahan method. significant differences in improvement were calculated with a paired sample T-test. All statistical analyses were performed with SPSS 27. Statistical significance was set at p < 0.05. RESULTS: Results show a significant (p˂0.05) improvement for the BJ from a mean baseline group performance of 2.26 ± 0.15 m to 2.44 ± 0.12 m after 12 weeks of RT even though mean BW significantly increased from 63.29 ± 5.65 kg to 64.29 ± 5.80 kg as a result of a significant improvement in mean lean body mass (LBM) from 57.13 ± 5.04 kg to 59.06 ± 4.95 & while BF% mean values significantly went down from 9.72 ± 1.49 % to 8.03 ± 1.22 %. CONCLUSION: The results of the present study show a significant improvement on the BJ and therefore on lower limb power. 12 weeks of RT and the increase in LBM that result from it did not negatively affect BJ performance, and this improvement was observed despite a significant increase in total body mass. However, further research should include a control group, to confirm without a doubt that an RT protocol can, in fact, improve BJ performance.

Relationship Between Postactivation Potentiation of Knee Extensor Muscles, Sprinting and Vertical Jumping Performance in Professional Soccer Players

Little is known about the relationship between postactivation potentiation (PAP) in human muscles, assessed by enhancement of twitch torque after a conditioning maximal voluntary contraction (MVC), and performance in activities requiring power and speed. Moreover, no studies have assessed PAP in soccer players who train power and endurance simultaneously. The purpose of the present study was to examine the relationship between twitch PAP in knee extensor (KE) muscles, and sprinting and vertical jumping performance in soccer players. Fourteen professional male soccer players with mean (SD) age 20.0 (3.6) years, height 177.9 (6.9) cm and body mass 70.5 (5.7) kg) were tested for 15-m sprint time, vertical jump height in countermovement (CMJ) and squat (SJ) jumps. PAP in KE muscles was induced by a 10-s isometric MVC. Electrically evoked twitches of KE muscles were evoked before and after the conditioning MVC. Immediately after the conditioning MVC, twitch peak torque (PT) and maximal rates of torque development and relaxation were significantly potentiated. A significant negative correlation was found between 15-m sprint time and jump height in CMJ (r = -0.63) and SJ (r = -0.57). PAP of twitch PT correlated significantly positively with jump height in CMJ (r = 0.61) and SJ (r = 0.64), and negatively with 15-m sprint time (r = -0.59). In conclusion, twitch PAP in KE muscles was significantly correlated with performance in vertical jumping and sprinting in male professional soccer players, whereas the magnitude of PAP in soccer players was similar to that observed previously in power-trained athletes.