Static vs. dynamic warm-up : the acute effects on hip flexor torque production

The Purpose of this study was to examine the acute effects of a static stretching warm-up versus a dynamic stretching warm-up on peak torque (PT) during hip flexion. The second purpose was to examine the pre- and post-warm-up surface electromyographic (EMG) amplitude of the tensor fasciae latae, biceps femoris, and rectus femoris, during leg extension and hip flexion, following a static versus dynamic warm-up. 16 healthy, male Muay Thai kick boxers (ages 25.6 ?? 2.8 yrs) completed the study, performing 1 of 2\ud warm-up protocols (dynamic or static), or the no-stretch (control) protocol. Subjects\ud were tested pre- and post- warm-up for muscle activity changes using EMG, followed by\ud two separate measures of maximal isokinetic hip flexion at predetermined velocities of\ud 270?? *s_l and 360?? *s_1. Repeated measures analyses of variance revealed no significant differences in torque production following all three warm-up protocols. Tukey's HSD multiple comparisons revealed significant EMG amplitude in the biceps femoris mean (p = .023) and biceps femoris peak (p = .043), following the dynamic warm-up. These results suggest either the dynamic or static warm-up protocols that were designed in this\ud study could be used as a pre-competition warm-up without eliciting performance deficits