Abstract
Purpose: The purpose of this study was to compare pitching motion of the professional female baseball pitchers with the male university baseball pitchers focused on the pelvic and thoracic movements. Subjects and methods: The participants were 15 healthy professional female baseball pitchers (11 right-handers and 4 left-handers; age, 21.7 ± 3.2 years; height, 162.5 ± 5.1 cm; weight, 59.0 ± 6.6 kg) and 14 healthy male university baseball pitchers (12 right-handers and 2 left-handers; age, 19.9 ± 0.8 years; height, 176.4 ± 3.0 cm; body mass, 73.1 ± 3.0 kg). Throwing motion was captured by three-dimensional motion analysis system. Kinematic data of the lead hip, pelvis, thorax, and dominant shoulder were collected and the joint angle at maximum external rotation phase and ball release phase were compared. Results: The female baseball pitchers rotated pelvis and thorax more than the male at the maximum external rotation phase and ball release phase (p < 0.05). At the same, the pelvis and thorax of the female baseball pitchers were tilted significantly closer to horizontal plane than the male (p < 0.05). The pelvis and thorax of the male baseball pitchers was tilted to non-dominant lateral side. Conclusions: The results of this study indicate that the pelvic and thoracic movements of the professional female baseball pitchers was different from male university pitchers.
Highlights
The kinetic chain of the lower and exthorax of female pitchers significantly directed to the first at both and tremity, trunk, and upper were extremity is considered important in base pitching motions
Tilt angles of the pelvis thorax of the stability the pivoting foot islateral important for transmitting theand energy profemale pitchers were lower than male pitchers at both
The results of this duced by translational motion during the early cocking phase to the lead leg, the trunk, study that theofpelvic and thoracic movements of the it professional femaletobaseball and theindicate throwing-side the upper extremity
Summary
The Japan Women’s Baseball League was established in 2010. The number of high school girls’ baseball clubs have increased from five in 2007 to 24 in 2017 [1]. The number of female baseball players is steadily increasing. The performance of female Japanese baseball players is high, taking the first place on six occasions and the second place twice in the Women’s. Baseball World Cup, which has been held since 2004. Investigating the characteristics of high-performing players might contribute to improving the performance of female baseball players and the prevention of pitching-related injuries
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