My undergraduate dissertation abstract: Assessing athlete readiness using jump monitoring is ineffective following repeated sprint exercise
Assessing athlete readiness using jump monitoring is ineffective following repeated sprint exercise.
The aim of the present study was to investigate the comparative sensitivity of the drop jump (DJ) and the countermovement jump (CMJ) when used as tools to detect neuromuscular fatigue following a repeated sprint protocol. Seven trained male participants (age 20.6 ± 1.5 years; height 176 ± 7 cm; body mass 84.6 ± 14.8 kg) volunteered for this study. Dependent variables of flight time, jump height, peak power, vertical velocity at take off, contact time, RSI and stiffness were measured using a force plate. Following baseline jump testing participants performed 15 x 30m sprints with an enforced 10m deceleration; a 60 second walk-back recovery was allowed between sprints. All dependent variables were re-measured on the force plate immediately after the sprints, then again at 24 hours, 48 hours and 72 hours to quantify the effects of fatigue. A one-way ANOVA with repeated measures determined that there were no significant differences (p > 0.05) or meaningful changes in any of the CMJ or DJ force variables measured over the 72 hour testing period. This investigation has shown that assessments of athlete readiness using the DJ and CMJ do not display adequate sensitivity in detecting fatigue following a repeated sprint protocol.
Key words: countermovement jump, drop jump, neuromuscular fatigue, sprinting, sensitivity.