The purpose of this study was to clarify the relationship between sprinting ability and ball speed in
college baseball pitchers, and to examine the evaluation method of sprinting ability considering body
weight and lean body mass. Thirty-one college baseball pitchers participated in this study. Height,
weight, lean body mass, body fat mass, muscle mass, and skeletal muscle mass were measured, and
body fat percentage, body mass index (BMI), and skeletal muscle index (SMI) were calculated. Ball speed
was measured using Rapsodo pitching 2.0. The baseball pitcher was asked to throw 10 full pitches from
the pitcher's mound toward the catcher. Maximum ball speed was used as an index of ball speed. To
evaluate sprint ability, sprint times of 10m, 30m, 50m, 100m, 200m, and 400m were measured, and
running speed, momentum, and kinetic energy were calculated. Pearson's product-moment correlation
coefficient was calculated to investigate the relationship between the measured indices. Ball speed was
significantly correlated with body weight, BMI, lean body mass, muscle mass, and SMI. In addition,
ball speed showed a significant negative correlation with running speed in 200m and 400m sprints,
and showed a significant positive correlation with momentum and kinetic energy in 10m, 30m, 50m,
and 100m sprints. The results of this study suggest the importance of considering body weight when
evaluating the sprinting ability of baseball pitchers.
野球投手のスプリント能力と投球速度の関係
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kiyo13-2-11
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