Effects of Aging on Force, Velocity, and Power in the Elbow Flexors of Males

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概要

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• The effect of aging on muscular power development was investigated by determining the force-velocity relationship. The muscle cross-sectional area (CSA) was estimated by the thickness of the elbow flexors. The subjects were 19 elderly males aged 69.1±3.7 years old (G-70 group), 15 middle-aged males aged 50.9±3.5 years old (G-50), and 19 young males aged 21.2±1.3 years old (G-20). The G-70 group had the slowest shortening velocities under various load conditions, resulting in the lowest force-velocity relationship. The maximum values for force (Fmax), velocity (Vmax), power (Pmax), dynamic constants (a, b), and the a/Fmax ratio were determined using Hill's equation. The a/Fmax ratio determines the degree of concavity in the force-velocity curve. The a/Fmax ratio was greatest in G-70, followed by those in G-50 and G-20, while the maximum values for force (Fmax), velocity (Vmax), and power (Pmax) were significantly lower in G-70 than in the other groups. Fmax and Pmax per CSA were lowest in G-70, and Vmax per unit muscle length was also lowest in G-70 as compared to the other age groups. The ratio of G-70/G-20 was greatest in Pmax (69.6%), followed by Fmax (75.3%) and Vmax (83.4%). However, there were no significant differences in CSA among the 3 age groups. Our findings suggest that muscle force and shortening velocity may decline gradually in the process of aging attributed to declining muscle function rather than CSA.

• 日本生理人類学会の論文

著者

• Toji Hideki

  School Of Human Science And Environment University Of Hyogo

• Kaneko Masahiro

  School Of Health And Sport Sciences Osaka University Of Health And Sport Sciences

• Kaneko Masahiro

  School Of Education University Of Tokyo

関連論文

• Effects of Aging on Force, Velocity, and Power in the Elbow Flexors of Males
• THE RELATION BETWEEN FORCE, VELOCITY AND MECHANICAL POWER IN HUMAN MUSCLE

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