Wide step width reduces knee abduction moment of obese adults during stair negotiation

Journal of Biomechanics
Derek YocumSongning Zhang

Abstract

An increased likelihood of developing obesity-related knee osteoarthritis may be associated with increased peak internal knee abduction moments (KAbM). Increases in step width (SW) may act to reduce this moment. The purpose of this study was to determine the effects of increased SW on knee biomechanics during stair negotiation of healthy-weight and obese participants. Participants (24: 10 obese and 14 healthy-weight) used stairs and walked over level ground while walking at their preferred speed in two different SW conditions - preferred and wide (200% preferred). A 2 × 2 (group × condition) mixed model analysis of variance was performed to analyze differences between groups and conditions (p < 0.05). Increased SW increased the loading-response peak knee extension moment during descent and level gait, decreased loading-response KAbMs, knee extension and abduction range of motion (ROM) during ascent, and knee adduction ROM during descent. Increased SW increased loading-response peak mediolateral ground reaction force (GRF), increased peak knee abduction angle during ascent, and decreased peak knee adduction angle during descent and level gait. Obese participants experienced disproportionate changes in loading-response mediolater...Continue Reading

Citations

Aug 12, 2020·Journal of Applied Biomechanics·Daniel W SampleSongning Zhang
May 24, 2020·Journal of Sport and Health Science·Tanner ThorsenSongning Zhang
Feb 11, 2021·Journal of Biomechanics·Tanner ThorsenSongning Zhang

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