Training methods and warm-up practices aimed at developing high levels of muscular power have recently received significant attention from researchers and applied practitioners. One such method utilises a combination of resistance training and sports-specific movement. The purpose of this study was to investigate the effects different intensity resistance exercises (i.e., 65, 75 or 85% 1-repetition maximum back squat) conducted over multiple sets prior to a 50m sprint in highly trained adolescent track and field athletes. A secondary purpose was to investigate whether the athletes` 1-repetition maximum back squat has an impact on the responses observed. The results suggest that performing heavy load resistance exercises (HRE) prior to the sprint start has no significant effect on 50m sprint performance in highly trained adolescent track and field athletes, even when conducted over multiple sets.
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