A Study on Relationship between Isokinetic Muscular Strength and Performance of Long Distance Runners

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  • 長距離選手の等速性筋力と競技成績に関する研究

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Abstract

The purpose of this study is to examine the relationship between isokinetic muscular strength and performance of long distance runners. 25 long distance runners were chosen as the subjects of this study. The subjects were grouped into A group (superior to 14.5 minutes of 5000m record), B group (inferior to 14.5 minutes of 5000m record), C group (best 5 of 5000m record) and D group (worst 5 of 5000m record). The leg extension strength was determined by measuring the peak torque generated through a range of constant velocity by the use of an isokinetic dynamometer (Cybex II, Lumex Inc.). Each subject was in sitting position in a chair with the knee angle 90 degrees, and swang the right leg in vigorous knee extension at the velocity of 30, 120, 210, and 300°/sec. The results were summarized as follows ; 1) Peak torque of B group was superior to that of A group. 2) Peak torque of D group was superior to that of C group. 3) V̇O_2max of A group was 3.6 1/min. and that of B group was 3.8 1/min. 4) V̇O_2max in C group was 3.8 1/min. and that in D group was 3.7 1/min. 5) Apparent difference was shown between age, years of athlete's experience of A group and those of B group. 6) Significant difference was found in age, years of athlete's experience of C group and those of D group. 7) Regression equation between best record of 5000m (Y) and age of athletes (X) was Y=-5.06X+988.22. 8) Regression equation between best record of 5000m (Y) and years of athlete's experience (X) was Y=-3.38X+905.21.

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