RELATIONSHIPS BETWEEN MUSCLE STRENGTH AND MUSCLE CROSS-SECTIONAL AREA IN MALE SPRINTERS AND ENDURANCE RUNNERS
RELATIONSHIPS BETWEEN MUSCLE STRENGTH AND MUSCLE CROSS-SECTIONAL AREA IN MALE SPRINTERS AND ENDURANCE RUNNERS
复制标题
DOI：
10.1007/bf00423237
复制
发表时间：
1983-01-01
影响因子：
3
通讯作者：
WEIR, J
中科院分区：
文献类型：
--
作者：
MAUGHAN, RJ;WATSON, JS;WEIR, J
在一组未经训练的受试者（对照组，n = 30）、一组成功的马拉松运动员（n = 6）和一组成功的短跑运动员（n = 6）中测量了膝关节伸肌横断面积（CSA）和最大自主等距力量之间的关系。所有受试者均为男性，年龄在20-41岁之间。在对照组中，肌肉力量与瘦体重呈正相关（P < 0.01），并与大腿中部水平的肌肉CSA呈正相关（P < 0.001）。尽管存在这些重要的关系，但受试者之间存在相当大的差异。短跑运动员显著强于耐力运动员（P < 0.01），但运动组与对照组均无显著差异。短跑运动员的肌肉CSA高于马拉松运动员，但这种差异并不显著。对照组肌力与CSA比值为7.07-13.57。所有训练对象均在正常范围内，但短跑运动员的单位CSA肌肉强于马拉松运动员（P < 0.05）。众所周知，短跑运动员的腿部肌肉含有高比例的快肌纤维（FT），而耐力运动员的腿部肌肉含有高比例的慢肌纤维（ST），这些结果表明，肌肉可以产生的力量可能取决于其纤维成分。因此，在未经训练的人群中，不同纤维类型分布的差异可能至少部分地解释了在这一群体中观察到的广泛差异。
The relationship between the cross-sectional area (CSA) and maximum voluntary isometric strength of the knee extensor muscles was measured in a group of untrained subjects (control group, n = 30), a group of successful marathon runners (n = 6) and a group fo successful sprinters (n = 6). All subjects were male, aged between 20-41 yr. In the control group, muscle strength was positively correlated with lean body mass (P < 0.01) and with muscle CSA as determined by computed tomography scanning of the leg at mid-thigh level (P < 0.001). In spite of these significant relationships, there was considerable variability between subjects. The sprinters were significantly stronger than the endurance runners (P < 0.01), but neither of the athletic groups differed significantly from the control group. Muscle CSA was greater in the sprinters than in the marathon runners but this difference was not significant. The ratio of muscle strength to CSA in the control group varied from 7.07-13.57. All the trained subjects fell within this normal range, but the sprinters muscles were stronger per unit CSA than the muscles of the marathon runners (P < 0.05). Since it is well established that the leg muscles of sprinters contain a high proportion of fast twitch (FT) muscle fibers whereas endurance runners have a high proportion of slow twitch (ST) fibers, these results suggest that the strength which can be produced by a muscle may depend on its fiber composition. Variation in the distribution of the different fiber types in the untrained population may therefore account at least in part for the wide variability observed in this group.