title: Power-load curve in trained sprinters.
abstract: The levels of lower-limb strength and power can distinguish between athletes of different levels in a number of sports, specifically in sprinting. In this sense, the purposes of this study were (a) to define the power–load curve in a modified half squat machine in trained sprinters in the competitive cycle and (b) to correlate the peak power (PP) production with 60-m sprint performance. In this sense, a cross-sectional study was carried out with 10 national level sprinters. After the calculation of 1 repetition maximum (1RM) of the participants, a progressive test, which consisted of moving loads of 30, 45, 60, 70, and 80% of the 1RM as quickly as possible in the concentric phase, was performed. It was found that PP occurred at 60% of 1RM. The power output with all loads was not significantly different (p ≤ 0.05) from each other. No significant correlations were found between 60-m performance and PP with the different loads. Therefore, we may conclude that the sprinters of national level analyzed present values of PP output, in the competitive period, near to 60% of 1RM in the half squat exercise; however, this power is not significantly different from the other loads.
authors: Kinesiology and Biomechanics Laboratory, Department of Physical Activity and Sport Sciences, San Antonio Catholic University of Murcia, Murcia, Spain. palcaraz@pdi.ucam.edu
authors: Pedro E
authors: PE
authors: Alcaraz
authors: Salvador
authors: S
authors: Romero-Arenas
authors: Helena
authors: H
authors: Vila
authors: Carmen
authors: C
authors: Ferragut
mesh_terms: D000293:Adolescent; D000328:Adult; D056352:Athletes; D054874:Athletic Performance / Q000502:physiology*; D003430:Cross-Sectional Studies; D006801:Humans; D035002:Lower Extremity / Q000502:physiology; D008297:Male; D053580:Muscle Strength / Q000502:physiology; D018482:Muscle, Skeletal / Q000502:physiology; D055070:Resistance Training; D012420:Running / Q000502:physiology*; D055815:Young Adult