Herbison G J, Jaweed M M, Ditunno J F
Arch Phys Med Rehabil. 1981 Jul;62(7):342-4.
The purpose of this histochemical study was to determine the effect of weight lifting exercise training on the muscle fibers in 2 muscle regions of the rat plantaris. Adult female Wistar rats were trained to carry weights up to 150 gm on their backs, up a 50 degrees incline, for a period of 6 weeks. A comparison between the exercised and control groups showed no significant muscle hypertrophy or change in the number of fibers. Only the smallest muscle fibers, which are located predominantly in the superficial region of the plantaris, showed a significant increase (19.6%, p less than 0.01) in diameter. The data suggest that the smallest muscle fibers, in the superficial region of the plantaris in this weight lifting training program, were exercised out of proportion to their usual activity and responded to the stress of the activity by enlarging.
本组织化学研究的目的是确定举重训练对大鼠跖肌两个肌肉区域肌纤维的影响。成年雌性Wistar大鼠接受训练，在其背部负重高达150克，沿50度斜坡上行，为期6周。运动组和对照组之间的比较显示，肌肉无明显肥大或纤维数量变化。仅主要位于跖肌浅表区域的最小肌纤维直径显著增加（19.6%，p<0.01）。数据表明，在该举重训练方案中，跖肌浅表区域的最小肌纤维所承受的运动量与其通常的活动量不成比例，并通过增大尺寸对活动压力作出反应。
