Abstract
Sensory evaluation of the optimum diameter was performed in grasping baseball bat grip, and the grasping pressure at finger and hand were measured during bat swing movement. The optimum diameter of bat grip was similarly to the diameter of the bat grip used in daily practice. During bat swing, the integrated pressure exerted in the finger and hand showed high value especially at the middle, ring and little fingers. At the ball impact, the fluctuation of the bat head of the optimum grip diameter was smaller than that of pessimum grip diameter. It was considered that the bat with optimum grip diameter is suitable for smooth bat swing.
