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特許 権利維持 Eccentric training is defined as active contraction of a muscle occurring simultaneously with lengthening of the muscle. For example, in a biceps curl the action of lowering the dumbbell back down from the lift is the eccentric phase of that exercise — as long as the dumbbell is lowered slowly rather than letting it drop (i.e., the biceps are in a state of contraction to control the rate of descent of the dumbbell).
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