INFLUENCE OF EXERCISE INTENSITY AND DURATION ON BIOCHEMICAL ADAPTATIONS IN SKELETAL-MUSCLE
INFLUENCE OF EXERCISE INTENSITY AND DURATION ON BIOCHEMICAL ADAPTATIONS IN SKELETAL-MUSCLE
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DOI：
10.1152/jappl.1982.53.4.844
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发表时间：
1982-01-01
影响因子：
3.3
通讯作者：
TERJUNG, RL
中科院分区：
文献类型：
--
作者：
DUDLEY, GA;ABRAHAM, WM;TERJUNG, RL
通过19种方案中的1种，在进行了为期8周（5天/周）的跑步机训练的大鼠中评估了运动强度和每日持续时间对3种肌纤维类型中细胞色素c浓度的影响。在6种跑步强度（10、20、30、40、50和60 m/min）下确定运动持续时间的重要性。每日跑步时间导致每个跑步强度的最大适应性变化。细胞色素c的变化，增加每日运行时间所造成的一般模式，遵循一阶的方式在所有的纤维类型。最终的时间无关的渐近值依赖于运行的强度。随着跑步强度的增加，达到峰值适应反应所需的每日跑步时间缩短。强度的影响是非常不同的纤维类型。在快速收缩红纤维中，在每种工作强度下的最大时间无关反应仅在次最大工作负荷下被运动强度改变（即，从19到29 nmol/g的适应在50和60 m/min时没有进一步增加）。快速收缩白色纤维中的适应性反应以30 m/min开始（apprx 80%VO2 max [最大O2摄取]），并且随着强度增加而指数增加（在60 m/min时增加200%）。这种不同的适应性反应之间的纤维类型是否仅仅是由于运动单位的有序招聘仍有待确定。
The influence of intensity and daily duration of exercise on cytochrome c concentration in the 3 muscle fiber types was assessed in rats that were treadmill-trained for 8 wk (5 days/wk) by 1 of 19 protocols. The importance of exercise duration was determined at 6 running intensities (10, 20, 30, 40, 50 and 60 m/min). Daily run times resulted in a maximal adaptive change for each running intensity. The general pattern of cytochrome c change, caused by increasing daily run times, followed a 1st-order manner in all fiber types. The final time-independent asymptotic values were dependent on the intensity of running. As running intensity was increased, the length of daily run time required to achieve the peak adaptive response was shortened. The intensity influence was very different between fiber types. In the fast-twitch red fiber, the maximal time-independent response at each work intensity was altered by exercise intensity at only submaximal work loads (i.e., the adaptation from 19 to 29 nmol/g was not further increased at 50 and 60 m/min). The adaptive response in the fast-twitch white fiber began at 30 m/min (.apprx. 80% .ovrhdot.VO2 max [maximum O2 uptake]) and increased exponentially as intensity was increased (200% increase at 60 m/min). Whether this different adaptive response between fiber types is due solely to the ordered recruitment of motor units remains to be determined.