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Publication - Dr Celia Gregson

    Feasibility and acceptability of using jumping mechanography to detect early components of sarcopenia in community-dwelling older women

    Citation

    Hannam, K, Hartley, A, Clark, EM, Sayer, AA, Tobias, JH & Gregson, CL, 2017, ‘Feasibility and acceptability of using jumping mechanography to detect early components of sarcopenia in community-dwelling older women’. Journal of Musculoskeletal and Neuronal Interactions, vol 17., pp. 246-257

    Abstract

    OBJECTIVE: To determine the feasibility and acceptability of using peak power and force, measured by jumping mechanography (JM), to detect early age-related features of sarcopenia in older women.

    METHODS: Community-dwelling women aged 71-87 years were recruited into this cross-sectional study. Physical function tests comprised the short physical performance battery (SPPB), grip strength and, if SPPB score≥6, JM. JM measured peak weight-adjusted power and force from two-footed jumps and one-legged hops respectively. Questionnaires assessed acceptability.

    RESULTS: 463 women were recruited; 37(8%) with SPPB⟨6 were ineligible for JM. Of 426 remaining, 359(84%) were able to perform ≥1 valid two-footed jump, 300(70%) completed ≥1 valid one-legged hop. No adverse events occurred. Only 14% reported discomfort. Discomfort related to JM performance, with inverse associations with both power and force (p⟨0.01). Peak power and force respectively explained 8% and 10% of variance in SPPB score (13% combined); only peak power explained additional variance in grip strength (17%).

    CONCLUSIONS: Peak power and force explained a significant, but limited, proportion of variance in SPPB and grip strength. JM represents a safe and acceptable clinical tool for evaluating lower-limb muscle power and force in older women, detecting distinct components of muscle function, and possibly sarcopenia, compared to those evaluated by more established measures.

    Full details in the University publications repository