The Effects of Regular Exercise on the Bone Mineral Density of the Calcaneus in vitro

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  • 摘出踵骨の骨密度における運動習慣の影響
  • テキシュツ ショウコツ ノ コツミツド ニ オケル ウンドウ シュウカン ノ エイキョウ

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Abstract

The scatter diagram of BMD values of 117 calcanei in vitro indicated clear negative regression versus age in both sexes. The regression lines in the graph suggested that the BMD values of females were 16－37％ lower than those of males during the period from age 65 to age 95, and that the reduction rate of BMD was 0.73％ per year in males and 1.36％ in females. <br>Previous regular exercise of the subjects was assigned risk scores from 0 to 2 points on the basis of questionnaires, focusing on the exercises at the younger adult period and the activities in daily life at later periods. The subjects were divided into 4 age subgroups (65～76 ; 77～83 ; 84～90 ; 91～100) in both sexes，and the average BMD was calculated in each subgroup depending on the risk scores. The average BMD of risk 0 group was highest and that of risk 2 group was lowest. The difference of BMD values between two risk groups was significant by t-test. Thus, it was concluded that regular exercise had an obvious effect on maintaining higher BMD.

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