The relationship between age and baseball pitching kinematics in professional baseball pitchers

Journal of Biomechanics
Shouchen DunJames R Andrews

Abstract

Joint range of motion and physical capacities have been shown to change with age in both throwing athletes and non-athletes. The age of professional baseball pitchers could span from late teens to mid-40s. However, the effects of age on the pitching kinematics among professional baseball pitchers are still unknown. In this study, 67 healthy professional baseball pitchers were tested using a 3D motion analysis system. Their mean age was 23.7+/-3.3 years (range 18.8-34.4). The 12 pitchers more than one standard deviation older than the mean (i.e., older than 27.0 years) were categorized into the older group, and the 10 pitchers more than one standard deviation younger than the mean (i.e., younger than 20.4 years) were defined as the younger group. In all, 18 kinematic variables (14 position and 4 velocity) were calculated, and Student's t-tests were used to compare the variables between the two groups. Six position variables were found to be significantly different between the two groups. At the instant of lead foot contact, the older group had a shorter stride, a more closed pelvis orientation, and a more closed upper trunk orientation. The older group also produced less shoulder external rotation during the arm cocking phase, m...Continue Reading

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Citations

Jan 17, 2013·Experimental Brain Research·M A Urbin
Jul 16, 2011·Journal of Strength and Conditioning Research·Ajit M W ChaudhariThomas M Best
Jan 8, 2011·The Journal of Orthopaedic and Sports Physical Therapy·Glenn S FleisigJames R Andrews
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