Effects of swing-weight on swing speed and racket power

Publication Type:
Journal Article
Journal of Sports Sciences, 2006, 24 (1), pp. 23 - 30
Issue Date:
Filename Description Size
Thumbnail2006003915.pdf674.4 kB
Adobe PDF
Full metadata record
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.
Please use this identifier to cite or link to this item: