Effects of swing-weight on swing speed and racket power
- Publication Type:
- Journal Article
- Citation:
- Journal of Sports Sciences, 2006, 24 (1), pp. 23 - 30
- Issue Date:
- 2006-01-01
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Measurements are presented of the speed at which six different rods could be swung by four male students. Three of the rods had the same mass but their swing-weight (i.e. moment of inertia) differed by large factors. The other three rods had the same swing-weight but different masses. Our primary objective was to quantify the effects of mass and swing-weight on swing speed. The result has a direct bearing on whether baseball, tennis, cricket and golf participants should choose a heavy or light implement to impart maximum speed to a ball. When swinging with maximum effort, swing speed (V) was found to decrease as swing-weight (Io) increased, according to the relation V = C/Ion where C is a different constant for each participant and n = 0.27 when Io > 0.03 kg·m2. Remarkably similar results were obtained previously with softball bats (where n = 0.25) and golf clubs (where n = 0.26). Swing speed remained approximately constant as swing mass increased (when keeping swing-weight fixed). The implications for racket power are discussed. © 2006 Taylor & Francis.
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