Many field sports involve equipment that restricts one or both arms from moving while running. Arm swing during running has been examined from a biomechanical and physiologic perspective but not from an injury perspective. Moreover, only bilateral arm swing suppression has been studied with respect to running. The purpose of this study was to determine the influence of running with one arm restrained on lower extremity mechanics associated with running or sport-related injury. Fifteen healthy participants ran at a self-selected speed with typical arm swing, with one arm restrained and with both arms restrained. Lower extremity kinematics and spatiotemporal measures were analysed for all arm swing conditions. Running with one arm restrained resulted in increased frontal plane knee and hip angles, decreased foot strike angle, and decreased centre of mass vertical displacement compared to typical arm swing or bilateral arm swing restriction. Stride length was decreased and step frequency increased when running with one or both arms restrained. Unilateral arm swing restriction induces changes in lower extremity kinematics that are not similar to running with bilateral arm swing restriction or typical arm swing motion. Running with one arm restrained increases frontal plane mechanics associated with risk of knee injury.

译文

:许多野外运动都涉及限制一只或两只手臂在跑步时移动的设备。已从生物力学和生理学的角度检查了跑步过程中的手臂摆动,但从伤害的角度未进行检查。此外,关于跑步,仅研究了双侧手臂摆动抑制。这项研究的目的是确定一只手臂被约束跑步对与跑步或运动相关的伤害相关的下肢力学的影响。 15名健康参与者以典型的手臂挥杆,一只手臂被约束和两只手臂被约束的速度以自行选择的速度跑步。分析了所有手臂摆动情况的下肢运动学和时空测量。与典型的手臂摆动或双侧手臂摆动限制相比,用一只手臂约束跑步会导致额平面膝盖和臀部角度增加,脚打击角减小以及质心垂直位移减小。当一只手或两只手都受约束时,步幅减小,步频增加。单侧手臂摆动限制引起下肢运动学的改变,这与双侧手臂摆动限制或典型的手臂摆动运动不相似。用一只手臂约束跑步会增加与膝盖受伤风险相关的额叶平面力学。

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