中高齢者の下肢筋力増強訓練に関する研究

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Study 1 : Isotonic contraction training using machines (leg press, leg extension, and leg curl) was conducted to middle-aged and aged women who participated in the "Knee Class" at this Institute. The subjects were randomly divided into two groups : a 30% load group given 30% of 1 repetition maximum (RM), consisting of 4 women (age : 69.0±8.4 years) ; and a 50% load group, consisting of 8 women (age : 64.0±6.89 years). The subjects were thoroughly directed to concentrate their attention upon contraction of the prime movers. As a result, the muscle strength tended to increase and knee joint functions tended to improve in both the 30% load group and the 50% load group. Study 2 : In order to clarify the difference between the groups, the muscle activities of the vastus medialis, rectus femoris, medial hamstring, and lateral hamstring during the leg extension training (with load of 30% and 50% of 1RM) was conducted on a 62-year-old woman. As a result, muscle activities increased under both loads when attension was concentrated on contraction of the prime movers during the training. In particular, a remarkable change was observed with the 30% load. More active muscle activities were achieved, as compared with the 50% load, in the medial and lateral hamstrings which are antagonistic muscle of quadriceps, by having the subjects concentrate their attension on contraction of the prime movers. It was found that the effect of increasing muscle strength in a similar level to that with a 50% load can be obtained with a low load of 30% by the subjects' concentrating their attension on the contraction of the prime movers.
愛知医科大学の論文
2007-03-15

中高齢者の下肢筋力増強訓練に関する研究

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