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The aim of this study was to investigate the recovery process of a maximal stretch-shortening cycle (SSC) fatigue workout on the biomechanical performance of drop jump (DJ) and rebound jump (RBJ) on a force sledge apparatus. Thirteen elite level rugby players performed sledge DJs and RBJs before and 15, 45, 120, and 300 seconds after a maximum SSC fatigue workout. Flight time, ground contact time (CT), peak force, reactive strength index (RSI), and leg-spring stiffness were the dependent variables. The DJ results showed that after 15 seconds recovery, there was a significant reduction in flight time (FT) (p &lt; 0.01), RSI (p &lt; 0.001), peak force (p &lt; 0.01), and leg stiffness (p &lt; 0.001). Similarly, the results for the RBJ indicated that the fatigue workout significantly reduced FT (p &lt; 0.001), peak force (p &lt; 0.01), RSI (p &lt; 0.01), and significantly increased CT (p &lt; 0.05) at the 15-second interval. The results also indicated a potentiation effect at the 300-second interval because of significant increases in RSI, peak force, and leg stiffness (p &lt; 0.05) for the RBJ and significant increases in RSI (p &lt; 0.05), peak force, and leg stiffness (p &lt; 0.01) and a significant decrease in ground CT (p &lt; 0.05) for the DJ. A maximal SSC fatigue workout had both an inhibiting and potentiating effect on DJ and RBJ performance depending on the recovery interval. The efficiency of the SSC function was reduced immediately after the cessation of the fatigue workout. A potentiation effect was evident for both jumps 300 seconds postfatigue.

An Investigation Into the Recovery Process of a Maximum Stretch-Shortening Cycle Fatigue Protocol on Drop and Rebound Jumps