Associations Between the Novel Jump Test, Grip Strength and Physical Performance: the Mros Study
Year: 2017
Type: conference-abstract
Abstract: Novel task-based and body-weight bearing jump tests assess maximum muscle power capacity and may differentially relate to physical performance vs. standard muscle function tests, though these are not well-studied. We evaluated these relationships in the Osteoporotic Fractures in Men (MrOS) Study. Muscle function tests included handheld dynamometry grip strength (kg) and jump peak power (Watts/kg body weight), force (Newton/kg body weight) and velocity (m/s) at peak power. Physical performance included 400m walk completion (seconds), 6m usual walk (m/s), and 5 repeat chair stands (seconds). Of men attending clinic visits (N=1,841; aged 85.0 ± 4.5 years; 10% minorities), 68% had valid jumps (N=1,242). In age, race, site and height adjusted Pearson correlations, jump power/kg was moderately correlated with all performance measures (range: r=0.42–0.48). Jump velocity was moderately correlated with 400m walk time (r=0.43). All other correlations were weak including grip strength with all jump and performance measures (r<0.40; all p<0.001). In linear regression with standardized β coefficients adjusted for age, race, site, height, falls history, hip/joint pain, cognition and comorbidities, 1 SD lower jump power/kg was associated with worse: 400m walk (β=0.48), 6m walk (β=0.43), and chair stands (β=0.41) (all p<0.001). Lower jump velocity results were similar (400m walk: β=0.45; 6m walk: β=0.40; chair stands: β=0.37), whereas lower jump force/kg and grip strength were more weakly associated with performance (range: β=0.21–0.25) (all p<0.001). Compared to grip strength and force/kg, stronger associations with performance for jump power/kg and velocity may indicate these are more sensitive predictors for functional loss in the oldest men.
Source: Innovation in Aging
Language: English
Field: Health Professions
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $3,977
OpenAlex ID: W2725945912