人体筋の力・速度・パワー関係に及ぼすトレーニング効果

抄録

The effects of different intensities of muscle training on the force, velocity and power relationship have been examined on human elbow flexor muscles. Twenty male subjects, 18-22 years of age, were divided into 4 different groups ; G₀, G₃₀, G₆₀, and G₁₀₀. Their training loads were prescribed by a fraction of isometric strength (P₀) measured at right angle of elbow joint : 0% P₀ (G₀ ; isotonic contraction without load), 30% P₀ (G₃₀), 60% P₀ (G₆₀), and 100% P₀ (G₁₀₀ ; isometric contraction) . The subject contracted his elbow flexors with maximum effort 10 times a day, 3 days a week for 12 weeks. The force-velocity relations and the resultant power output were determined, before and after training period, by a modified Wilkie's apparatus.
The training by maximum isotonic contraction without load (G₀) was found to be most effective for improving maximum velocity (V₀), while the isometric training improved isometric strength (P₀) most. For this, the P-V relations of these groups were specifically modified by greater velocity component (G₀) or greater force component (G₁₀₀) . The G₃₀ and G₆₀ groups showed such all-round improvements that the P-V relations shifted in parallel with those of pre-training period. The maximum power (PVmax), which calculated from P-V relationship, increased most in G₃₀, followed by G₁₀₀, G₆₀, and G₀ groups.
From these results it was concluded that the different training loads brought about specific effects on P-V relation, and that the most effective load for improving maximum power was 30% of isometric strength.