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Article Title

COMPARISON OF THE LOAD-VELOCITY RELATIONSHIP DURING BACK SQUAT IN RESISTANCE TRAINED MEN AND WOMEN

Abstract

Cody A. Stahl1, Marcel Lopes dos Santos1, Daniel Lawson1, Keston G. Lindsay2, Whitney Trammel2, Ryland Townsend2, J. Bryan Mann3, Robert G. Lockie4, J. Jay Dawes1

1Oklahoma State University, Stillwater, OK, USA; 2University of Colorado Colorado Springs, Colorado Springs, CO, USA, 3Kinesiology and Sports Science Department, University of Miami, Coral Gables, FL, USA, 4California State University-Fullerton, Fullerton, CA, USA

PURPOSE: The purpose of this study was to analyze and compare the mean concentric barbell velocity of the back squat at different loads (%1RM) between resistance trained men and women. METHODS: Fourteen (7 males and 7 females) resistance trained college students volunteered to participate in this study (mean  SD for years of resistance training experience was 6.8  3.0 years for males and 5.9  3.9 years for females). Participants reported to the laboratory on two occasions, separated by at least 48 hours. In the first visit, the one repetition maximums (1RM) were determined for the back squat, and participants were familiarized with using a self-spotting squat rack (Pro-spot). During the second visit, the participants performed single repetitions at incremental increases of each tenth percentile (10–90%) of the 1RM. Participants completed a total of nine repetitions, resting 3-5 minutes between each repetition. For each repetition, the subjects were instructed to press the barbell as rapidly as possible. Mean concentric barbell velocity was measured with a linear position transducer. A repeated measures analysis of variance (ANOVA) was used to compare the mean barbell velocity between sexes across all submaximal intensity loads for the squat. RESULTS: Sex differences in MBV were found to be significant (p = .042). Significant differences in MBV were found based on load (p < .05), irrespective of sex (see figure 1). Mean bar velocity decreased, almost linearly, across all intensities, irrespective of sex. It was found that men produce higher average bar velocities across all relative loads in the back squat. CONCLUSION: The present findings suggest that males move the barbell faster even with the same relative load.

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