COMPARISON OF GROUND REACTION FORCES BETWEEN IN-PLACE AND FORWARD WATER RUNNING AT TWO LEVELS OF IMMERSION
Keywords: biomechanics, aquatic exercises, hydrogymnastics
AbstractThis study compared GRF of in-place and forward water running at two levels of immersion. Twenty healthy subjects executed both exercises at a self selected speed at hip and chest immersion. Variables analyzed were: vertical peak (Fy), anterior peak (Fx anterior) and posterior peak (Fx posterior). Two-factor repeated measures ANOVA was used with p<0.05. Although in-place running presented lower values of Fx anterior (0.05 BW at chest and 0.08 BW at hip), both Fx posterior (-0.05 BW at chest and -0.07 BW at hip) and Fy (1.10 BW at chest and 1.29 BW at hip) were greater than forward running (Fx anterior = 0.26 BW and 0.31 BW; Fx posterior = -0.02 BW and -0.03 BW; Fy 0.79 BW and 0.96 BW at chest an hip level respectively). The effect of level of immersion was only significant for Fy and Fx anterior, being greater at hip level.
Coaching and Sports Activities
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