Lower extremity kinematic and kinetic factors associated with bat speed at ball contact during the baseball swing.

IF 2 3区医学 Q3 ENGINEERING, BIOMEDICAL

Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2023-10-18 DOI:10.1080/14763141.2023.2269418

Karl F Orishimo, Ian J Kremenic, Edward Modica, Takumi Fukunaga, Malachy P McHugh, Srino Bharam

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引用次数: 0

Abstract

The purpose of this study was to determine which biomechanical variables measured during the baseball swing are associated with linear bat speed at ball contact (bat speed). Twenty collegiate baseball players hit a baseball from a tee into a net. Kinematics were recorded with a motion capture system sampling at 500 Hz and kinetics were measured by force plates under each foot sampling at 1000 Hz. Associations between bat speed, individual joint and segment kinematics, joint moments and ground reaction forces (GRF) were assessed using Pearson correlations and stepwise linear regression. Average bat speed was 30 ± 2 m/s. Lead foot peak vertical (159 ± 29% BW, r = 0.622, P = 0.001), posterior (-57 ± 12% BW, r = -0.574, P = 0.008) and resultant (170 ± 30% BW, r = 0.662, P = 0.001) GRF were all correlated with bat speed. No combination of factors strengthened the relationship to bat speed beyond these individual variables. These results illustrate the role of the lead leg in generating and transferring ground reaction forces through the kinetic chain in order to accelerate the bat. Training to improve bat speed should include both general lower extremity strengthening exercises and sport-specific hitting drills to improve lower extremity force production following lead foot contact.

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棒球挥杆过程中与击球速度相关的下肢运动学和动力学因素。

本研究的目的是确定在棒球挥杆过程中测量的生物力学变量与击球时的线性击球速度（击球速度）有关。20名大学棒球运动员把一个棒球从球座上打到了球网上。用运动捕捉系统在500 Hz和动力学通过力板在1000 赫兹。使用Pearson相关性和逐步线性回归评估了击球速度、单个关节和分段运动学、关节力矩和地面反作用力（GRF）之间的关系。平均击球速度为30 ± 2. m/s。铅脚峰垂直（159 ± 29%BW，r = 0.622，P = 0.001），后部（-57 ± 12%BW，r = -0.574，P = 0.008）和所得（170 ± 30%BW，r = 0.662，P = 0.001）GRF均与击球速度相关。除了这些单独的变量之外，没有任何因素的组合能够加强与击球速度的关系。这些结果说明了铅腿在通过运动链产生和传递地面反作用力以加速蝙蝠方面的作用。提高击球速度的训练应包括一般的下肢强化训练和特定运动的击球训练，以提高铅足接触后的下肢力量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sports Biomechanics 医学-工程：生物医学

CiteScore

5.70

自引率

9.10%

发文量

135

审稿时长

>12 weeks

期刊介绍： Sports Biomechanics is the Thomson Reuters listed scientific journal of the International Society of Biomechanics in Sports (ISBS). The journal sets out to generate knowledge to improve human performance and reduce the incidence of injury, and to communicate this knowledge to scientists, coaches, clinicians, teachers, and participants. The target performance realms include not only the conventional areas of sports and exercise, but also fundamental motor skills and other highly specialized human movements such as dance (both sport and artistic). Sports Biomechanics is unique in its emphasis on a broad biomechanical spectrum of human performance including, but not limited to, technique, skill acquisition, training, strength and conditioning, exercise, coaching, teaching, equipment, modeling and simulation, measurement, and injury prevention and rehabilitation. As well as maintaining scientific rigour, there is a strong editorial emphasis on ''reader friendliness''. By emphasising the practical implications and applications of research, the journal seeks to benefit practitioners directly. Sports Biomechanics publishes papers in four sections: Original Research, Reviews, Teaching, and Methods and Theoretical Perspectives.