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Comparative Study
, 106 (4), 573-81

Running Versus Strength-Based Warm-Up: Acute Effects on Isometric Knee Extension Function

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Comparative Study

Running Versus Strength-Based Warm-Up: Acute Effects on Isometric Knee Extension Function

Olivier Girard et al. Eur J Appl Physiol.

Abstract

This study investigated the influence of two warm-up protocols on neural and contractile parameters of knee extensors. A series of neuromuscular tests including voluntary and electrically evoked contractions were performed before and after running- (R(WU); slow running, athletic drills, and sprints) and strength-based (S(WU); bilateral 90 degrees back squats, Olympic lifting movements and reactivity exercises) warm ups (duration approximately 40 min) in ten-trained subjects. The estimated overall mechanical work was comparable between protocols. Maximal voluntary contraction torque (+15.6%; P < 0.01 and +10.9%; P < 0.05) and muscle activation (+10.9 and +12.9%; P < 0.05) increased to the same extent after R(WU) and S(WU), respectively. Both protocols caused a significant shortening of time to contract (-12.8 and -11.8% after R(WU) and S(WU); P < 0.05), while the other twitch parameters did not change significantly. Running- and strength-based warm ups induce similar increase in knee extensors force-generating capacity by improving the muscle activation. Both protocols have similar effects on M-wave and isometric twitch characteristics.

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