Poor correlation between handgrip strength and isokinetic performance of knee flexor and extensor muscles in community‐dwelling elderly women

• DOI: 10.1111/ggi.12077
• Publication Date: 2013-04-26T04:00:21Z
• Authors: Diogo Carvalho Fe...; Daniele Sirineu P...; Alexandra Miranda...; Fabianna Resende ...; Barbara Zille de ...; Juscelio Pereira ...; Naysa Maciel de B...; João Marcos Domin...; Leani Souza Máxim...
• Keywords: Aging; 03 medical and health sciences; Cross-Sectional Studies; 0302 clinical medicine; Hand Strength; Humans; Female; Muscle Strength Dynamometer; Muscle, Skeletal; Geriatric Assessment; Aged

AimTo investigate the correlation between handgrip strength and performance of knee flexor and extensor muscles determined using an isokinetic dynamometer in community‐dwelling elderly women.MethodsThis was a cross‐sectional study. Sample selection for the study was made by convenience, and 221 (71.07 ± 4.93 years) community‐dwelling elderly women were included. Knee flexor and extensor muscle performance was measured using an isokinetic dynamometer Biodex System 3 Pro. The isokinetic variables chosen for analysis were peak torque, peak torque/bodyweight, total work/bodyweight, total work, average power, and agonist/antagonist ratio at the angular velocities of 60°/s and 180°/s. Assessment of handgrip strength was carried out using the Jamar dynamometer. Spearman's correlation coefficient was calculated to identify intervariable correlations.ResultsOnly knee flexor peak torque (60°/s) and average power (60°/s), and knee extensor peak torque (180°/s) and total work (180°/s) were significantly (P < 0.05), yet poorly, correlated with handgrip strength (r < 0.30).ConclusionThe majority of analyses did not show any correlation between variables assessed by isokinetic dynamometer and handgrip dynamometer. Caution is required when generalizing handgrip strength as a predictor of global muscle strength in community‐dwelling elderly women. Geriatr Gerontol Int 2014; 14: 185–189.