http://www.tandfonline.com/doi/pdf/10.1080/14763141.2016.1159319
Differences among fastball, curveball, and changeup pitching biomechanics
across various levels of baseball
速球,曲球跟变速球的生物力学在不同层级的差异
Sports Biomechanics, 2016, VOL. 15, NO. 2, 128–138
Glenn S. Fleisig, Walter A. Laughlin, Kyle T. Aune, E. Lyle Cain, Jeffrey R.
Dugas & James R. Andrews
Conclusions
结论
There were no differences in shoulder and elbow kinetics between fastballs
and curveballs,regardless of level of competition. Kinetic values were lower
in change-ups than in fastballs. Thus, this study—along with previous
biomechanical and epidemiologic studies—does not support the theory that
curveballs are more stressful and dangerous than fastballs, particularly for
youth pitchers.
在生物力学在各个层级上投曲球跟速球对肩膀跟手肘施加的力量一样,
而变速球比曲球跟速球不伤手
这研究跟之前的研究都表示 曲球不会比速球来得伤手,特别对小朋友来说
Kinematic differences were observed between pitch types. In particular, body
joint positions at the instant at ball release were significantly different
between the fastball, curveball, and change-up. It is unknown whether these
small, but statistically significant differences are visually detectable by
batters.
运动学的差异可在不同球种中发现,特别是关节在放球时特别明显
不清楚这些微小动作但是在统计上很明显的差异是不是可以被打者肉眼观察到