Abstract
Sensory evaluation of the optimum diameter in grasping tennis racket and the grasping pressure at fingers and the acceleration at the top of frame and the bottom of grip during stroke and volley swing were investigated. The correlation between the optimum diameter for grasping of tennis racket and the dimensions of hand was not found. At the ball impact during stroke and volley swing, the acceleration of the bottom of racket grip showed the lower values at the grasping of optimum grip. The pressure produced at fingers had higher values at the tip of thumb and little finger, and at the root of middle and ring fingers. The pressure at fingers showed highest value by the grip having the diameter less than optimum one. It was considered that the optimum diameter for grasping has the merits to reduce the movement of hand at ball impact, and contribute to the accurate swing, on the other hand, at ball impact, the maximum grip force is produced by the diameter less than optimum grasping diameter.
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