STAIR CLIMB TIME AND FUNCTIONAL POWER ASSOCIATIONS IN EARLY OLD AGE: SWAN. (8th November 2019)

• Record Type: Journal Article
• Authors: Strotmeyer, Elsa; Lange-Maia, Brittney S; Cauley, Jane A; Dugan, Sheila A; Khoudary, Samar R El; Gabriel, Kelley Pettee; Glynn, Nancy W; Karvonen-Gutierrez, Carrie A
• Is Part Of: Innovation in aging. Volume 3(2019)Supplement 1
• Page Start: S541
• Page End: S541
• Publication Date: 2019-11-08
• Subjects: Aging -- Periodicals; Gerontology -- Periodicals; 612.67
• DOI: 10.1093/geroni/igz038.1988
• Languages: English
• ISSNs: 2399-5300

Abstract

Abstract: Stair climbing assesses neuromuscular components of movement, including muscle power (force*velocity) which may decline earlier in aging vs. strength. We hypothesized age and age-related factor (N=1370; 65.5±2.7 years) associations to stair climb total time (sec), ascend lap time degradation (lap 1 minus 3), power (W/kg body weight) and power degradation (lap 1 minus 3). Adjusting for demographic, lifestyle and age-related comorbidity factors using multivariate linear regression, older age independently related to slower total time and lower power. Non-white ethnicity had slower total time (Black, Hispanic), higher ascend time degradation (Hispanic), and lower power (Hispanic, Chinese, Japanese) vs. Whites. Higher 36-Item Short Form Health Survey (SF-36) and Modified Baecke physical activity scores indicated better performance: lower total time, higher power (SF-36 only), and less degradation in ascend time and power. Stair climb time and power in early old age may capture initial functional loss targets for interventions to prevent late-life disability.