Relationship Between Muscle Strength Asymmetry and Body Sway in Older Adults

in Journal of Aging and Physical Activity
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The purpose of this study was to investigate the relationship between muscle strength asymmetry and body sway while walking. We studied 63 older adult women. Strong side and weak side of knee extension strength, toe grip strength, hand grip strength, and body sway while walking were measured. The relationship between muscle strength asymmetry for each muscle and body sway while walking was evaluated using Pearson’s correlation coefficient. Regarding the muscles recognized to have significant correlation with body sway, the asymmetry cutoff value causing an increased sway was calculated. Toe grip strength asymmetry was significantly correlated with body sway. Toe grip strength asymmetry causing an increased body sway had a cutoff value of 23.5%. Our findings suggest toe grip strength asymmetry may be a target for improving gait stability.

Koda is with the Kansai University of Welfare Sciences, Kashiwara, Japan. Kai and Murata are with the Dept. of Physical Therapy, Faculty of Health Science, Kyoto Tachibana University, Kyoto, Japan. Fukumoto and Imagita are with the Graduate School of Health Sciences, Kio University, Koryo, Nara Prefecture, Japan. Osugi is with the Faculty of Social Welfare, Josai International University, Togane, Chiba Prefecture, Japan. Anami is with the Dept. of General Rehabilitation, Faculty of Allied Health Sciences, Yamato University, Suita, Osaka Prefecture, Japan.

Address author correspondence to Hitoshi Koda at h-koda@tamateyama.ac.jp.
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