Changes in vertical and horizontal jump performance following prolonged exercise
Cardiff Metropolitan University
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Recently, there has been an increasing amount of literature examining the effect of fatigue induced by soccer-specific exercise on measures of vertical and horizontal jump performance. However, few authors have considered both vertical and horizontal jumps within the same investigation. Therefore, the aim of this study is to explore the changes in vertical and horizontal jump performance following a soccer-specific exercise protocol. Eight male amateur footballers (mean ±SD: age 21.3 ±1.6 yrs.; mass 78.3 ±7.5kg; height 177.0 ±6.0cm) performed a squat jump (SJ), countermovement jump (CMJ), drop jump (DJ) on a contact mat (Smartjump, Fusion Sport, Brisbane, Australia) and a standing long jump (SLJ) pre, mid and post completion of a 96 minute soccer-simulation protocol (SSP) (Stone et al., 2011). Significant decreases from pre to post-SSP performance variables were observed for the SJ and CMJ; jump height, impulse, peak power output (PPO) and PPO/kg (P ˂ 0.05). Contrastingly, no significant reductions were seen in either DJ or SLJ performance (P ˃ 0.05). The results suggest that the SJ and CMJ are more sensitive measures of post soccer-specific exercise induced fatigue than the DJ or SLJ. Therefore, practitioners and researchers who wish to monitor post-match fatigue or assess the effectiveness of fatigue reducing interventions should utilise either a SJ or CMJ. Future research could aim to extend measurements of fatigue beyond immediately post-SSP (for example up to 7 days post) in an attempt to gain a better understanding of the time period needed for sufficient recovery from soccer-specific fatigue.
DEGREE OF BACHELOR OF SCIENCE (HONOURS) SPORT AND EXERCISE SCIENCE
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