Date of Award
Master of Science
John L Williams
William M Mihalko
This study investigated the effects of body mass index (BMI) on stability and biomechanics during single leg stance (SLS) and stair descent (SD). A group of six high BMI subjects was compared with an age-matched control group of eleven young 'normal weight' (BMI < 25) adults. The high BMI individuals descended the stairs more slowly with longer support times. Their supporting limbs experienced larger hip, knee, and ankle sagittal-plane moments (normalized), smaller frontal plane hip moments, and larger frontal plane knee moments at toe-off of the swing limb, compared to controls. At swing limb touchdown, the supporting limb experienced hip flexion moments as opposed to extension moments, larger knee adduction moments, and lower normalized anterior ground reaction forces compared to controls. No differences were found for the investigated parameters during SLS. Stair descent differences in the high BMI participants suggest possible cumulative joint overloading, greater osteoarthritis risk, and decreased stability.
dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.
Palumbo, Tyler Ross, "Static and Dynamic Postural Stability of High Body Mass Index Subjects During Single-Leg Stance and Stair Descent" (2014). Electronic Theses and Dissertations. 864.