Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada.
Sports Biomech. 2012 Sep;11(3):391-401. doi: 10.1080/14763141.2012.654503.
The purpose of this study was to examine the impact of wearing a resistance band around the distal thigh on frontal plane knee mechanics during bodyweight squat and jumping exercises. Three closed-kinetic-chain exercises were examined, including: (1) bodyweight squat, (2) countermovement jump, and (3) squat jump. For each exercise, three experimental conditions were tested: (1) control condition with no band; (2) light-tension band applied around the distal thighs; and (3) medium-tension band applied around the distal thighs. Two dependent measures were used for analyses: (1) knee width normalized to ankle width and (2) peak external knee moment. In the absence of any feedback, application of the resistance bands failed to promote 'neutral' knee alignment when squatting and jumping. The stiffest resistance band resulted in significantly lower (p = 0.002) peak-width index values during the ascent phase of the countermovement jump. Additionally, the use of the medium-tension band resulted in significantly larger (p = 0.002) peak knee abduction moments compared to the no bands condition during the descent portion of the bodyweight squat and countermovement jump exercises. These findings conflict with previous clinical case reports on the proprioceptive response induced by resistance bands.
本研究旨在探讨在进行体重深蹲和跳跃运动时，大腿远端绑缚阻力带对额状面膝关节力学的影响。研究考察了三种闭链运动，包括：（1）体重深蹲，（2）反向跳跃，和（3）深蹲跳跃。对于每种运动，测试了三种实验条件：（1）无带的对照条件；（2）大腿远端施加轻张力带；（3）大腿远端施加中张力带。使用两个依赖变量进行分析：（1）膝盖宽度归一化到脚踝宽度，和（2）峰值外部膝盖力矩。在没有任何反馈的情况下，绑缚阻力带未能在深蹲和跳跃时促进“中立”的膝盖对齐。最硬的阻力带导致反向跳跃上升阶段的峰值宽度指数值显著降低（p = 0.002）。此外，与无带条件相比，中张力带在体重深蹲和反向跳跃下降阶段导致显著更大的峰值膝盖外展力矩（p = 0.002）。这些发现与先前关于阻力带引起的本体感受反应的临床病例报告相冲突。
