Age-related changes in lower extremity muscle strength as determined by a hand-held dynamometer.

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  • SENDA Masuo
    Department of Orthopedic Surgery, Okayama University Medical School

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  • 下肢筋力の経年変化　　用手力量計による測定
  • カシ キンリョク ノ ケイネン ヘンカ ヨウ シュリキリョウケイ ニ ヨル ソ
  • 用手力量計による測定

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Abstract

With use of a specially made spring-type hand-held dynamometer, maximal isometric strength was measured in 626 healthy persons between 11 and 79 years of age. Measurements were taken at the ankle, with the subject supine, for leg abduction, single straight-leg raising, and double straight-leg raising. Physical dimensions of the subjects were standard in terms of body weight and Kaup's index.<br>Among both men and women, greatest strength was seen among subjects in their late teens and in their twenties. Girls at 14 years of age were already closely approaching the peak values for women, and strength among the women declined very little up through the fourth decade. Men manifested more of a regular decrement in strength after the peack. Men in their sixties could produce only about 50 per cent of the peak strength of men for each of the three tasks, whereas women in their sixties reached about 70 per cent of the corresponding peak values of women. Differences according to sex were seen throughout except at 11 years of age. Sex difference was greatest during the peak years, when the men were twice as strong as the women in each of the three tasks.

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