Journal
JOURNAL OF BIOMECHANICS
Volume 45, Issue 10, Pages 1769-1774Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jbiomech.2012.05.002
Keywords
Biomechanics; Gait; Obesity; Weight loss; Bariatric surgery
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Funding
- University of Eastern Finland
- Kuopio University Hospital [5960431]
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This study examines the effects of a radical bariatric surgery-induced weight loss on the gait of obese subjects. We performed a three-dimensional motion analysis of lower limbs, and collected force platform data in the gait laboratory to calculate knee and hip joint moments. Subjects (n=13) performed walking trials in the laboratory before and 8.8 months (SD 4.2) after the surgical procedure at two gait speeds (1.2 m/s and 1.5 m/s). The average weight loss was 26.7 kg (SD 9.2 kg), corresponding to 21.5% (SD 6.8%) of the initial weight. We observed a decrease in step width at both gait speeds, but no changes in relative double support or swing time or stride length. A significant decrease was noted in the absolute values of peak knee abductor, peak knee flexor and peak hip extensor moments. However, the moment values normalized by the body weight and height remained unchanged in most cases. Thus, we conclude that weight loss reduces hip and knee joint moments in proportion to the amount of weight lost. (C) 2012 Elsevier Ltd. All rights reserved.
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