ラットのジャンプトレーニングにおけるジャンプ時の床反力と骨強度および骨重量との関係

概要

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The purpose of this study was to examine the relationship between the ground reaction force and bone hypertrophy in rats that performing a jumping exercise. The rats (10 weeks) were divided into 3 jump-exercise groups, made to jump to different heights (30 cm, 40 cm and 50 cm) and a sedentary group (n=10). They were in each group made to jump 40 times per day, 5 days a week for 4 weeks. The ground reaction force at the time of take off for the jump was measured on the force plate. The rats' right tibias were afterward dissected out and the ultimate bending load, by three-point bending test, and fat free dry weight were measured. The ultimate bending load and fat free dry weight were significantly greater in all training groups than in the sedentary group. Furthermore, the ultimate bending load in the 40 cm and 50 cm groups was significantly greater than in the 30 cm group. The ground reaction force was significantly greater in the 50 cm group than in the 30 cm group. A positive correlation was found between the ground reaction force and ultimate bending load. The present study indicates that ground reaction force and bone adaptation are greater in accordance with jump height in rats.
2001-03-31