Analysis of the associations between variables derived throughout velocity-based training device and jumping performances in youth soccer players: Multiple regression study

Vlade Bendic,Damir Sekulic,Ivan Peric,Damir Lastre,Barbara Gilic

doi:10.5507/ag.2021.019

Abstract

Background: It has been suggested that velocity-based training (VBT) improves real-life performance in sports, such as jumping, but studies rarely examined the associations between variables derived during VBT (VBT-variables) and jumping performances. Objective: The aim of this study was to investigate the associations between VBT-variables derived during deadlift exercise executed at different loads and anthropometric variables, and vertical and horizontal jump performance in young athletes. Methods: Seventeen youth soccer players (16-18 years old) were included. Predictors were body height, body mass, body fat percentage, and VBT-variables (force, power, and velocity) measured at different loads (45%, 55%, 65%, 75%, 85%, and 95%) of a one-repetition maximum deadlift (1RM). Criteria included tests of vertical and horizontal jumping performance. Results: The VBT-variables are more strongly correlated with horizontal jumps (Pearson's r up to .81) than vertical jumps (Pearson's r up to .75). The VBT-variables for the deadlift recorded at lower loads stronger correlated with jumping performance than the VBT-variables recorded at higher loads. Conclusions: Results of the study suggest that light-to-moderate loads (45%-65% of 1RM) maximize power output and are therefore more strongly related to jumping performance in youth athletes. Further intervention studies aimed at the improvement of jumping performances using the VBT are warranted.

Highlights

Training with external loads, known as resistance training, is an efficient method for improving sports performance, as it promotes muscle hypertrophy and increases the maximal power, rate of force development, and power output (Schoenfeld et al, 2016)
Anthropometric variables were not significantly correlated with jumps, while most of the velocity-based training (VBT)-variables significantly correlate with both jumping performances
Multivariate regressions between anthropometric indices and power-variables derived during VBT at different loads and BJ reached statistical significance for calculations including power-variables at 45%1RM (74% of the explained variance), 55%1RM (69% of the explained variance), 65%1RM (64% of the explained variance), 75%1RM (67% of the common variance), and 85%1RM (73% of the common variance; Table 2)

Summary

Introduction

Known as resistance training, is an efficient method for improving sports performance, as it promotes muscle hypertrophy and increases the maximal power, rate of force development, and power output (Schoenfeld et al, 2016). The PBT method becomes relatively problematic when daily fluctuations in strength and power are considered. It has been suggested that velocity-based training (VBT) improves real-life performance in sports, such as jumping, but studies rarely examined the associations between variables derived during VBT (VBT-variables) and jumping performances. Objective: The aim of this study was to investigate the associations between VBT-variables derived during deadlift exercise executed at different loads and anthropometric variables, and vertical and horizontal jump performance in young athletes. Predictors were body height, body mass, body fat percentage, and VBT-variables (force, power, and velocity) measured at different loads (45%, 55%, 65%, 75%, 85%, and 95%) of a one-repetition maximum deadlift (1RM). Conclusions: Results of the study suggest that light-to-moderate loads (45%–65% of 1RM) maximize power output and are more strongly related to jumping performance in youth athletes. Further intervention studies aimed at the improvement of jumping performances using the VBT are warranted

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Methods

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Discussion

Conclusion