Ten‐year longitudinal changes in muscle power, force, and velocity in young, middle‐aged, and older adults

Autor: Julian Alcazar, Carlos Rodriguez‐Lopez, Christophe Delecluse, Martine Thomis, Evelien Van Roie
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Journal of Cachexia, Sarcopenia and Muscle, Vol 14, Iss 2, Pp 1019-1032 (2023)
Druh dokumentu: article
ISSN: 2190-6009
2190-5991
DOI: 10.1002/jcsm.13184
Popis: Abstract Background Maximum muscle power (Pmax) is a biomarker of physical performance in all ages. No longitudinal studies have assessed the effects of aging on Pmax obtained from the torque‐velocity (T‐V) relationship, which should be considered the ‘gold standard’. This study evaluated the longitudinal changes in the T‐V relationship and Pmax of the knee‐extensor muscles in young, middle‐aged, and older adults after 10 years of follow‐up. Methods Four hundred eighty‐nine subjects (311 men and 178 women; aged 19–68 years) were tested at baseline and after a 10‐year follow‐up. Anthropometric data, daily protein intake, physical activity level (PAL), and knee‐extension muscle function (isometric, isokinetic, and isotonic) were evaluated. A novel hybrid equation combining a linear and a hyperbolic (Hill‐type) region was used to obtain the T‐V relationship and Pmax of the participants, who were grouped by sex and age (young: 20–40 years; middle‐aged: 40–60 years; and old: ≥60 years). Linear mixed‐effect models were used to assess effects of time, sex, and age on T‐V parameters, Pmax, and body mass index (BMI). Additional analyses were performed to adjust for changes in daily protein intake and PAL. Results Pmax decreased in young men (−0.6% per year; P
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