LOCAL MUSCLE BLOOD-FLOW AND SUSTAINED CONTRACTIONS OF HUMAN ARM AND BACK MUSCLES
LOCAL MUSCLE BLOOD-FLOW AND SUSTAINED CONTRACTIONS OF HUMAN ARM AND BACK MUSCLES
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DOI：
10.1007/bf00999914
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发表时间：
1975-01-01
期刊：
影响因子：
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通讯作者：
NIELSEN, E
中科院分区：
文献类型：
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作者：
BONDEPETERSEN, F;MORK, AL;NIELSEN, E
对 3 名受试者进行了肘部、屈肌、肘伸肌和背部伸肌持续收缩时的耐力测试。使用的力水平在大约之间变化。 15 和约。最大等长力量 (IS) 的 75%。在耐力测试期间和之后记录133Xe从收缩肌肉中的清除情况。通过这种方式，可以确定收缩期间肌肉血流量 (MBF) 是否增加或停止。上臂人工缺血实验和 MBF 测量表明，MBF 对于超过一定力量水平的持续持续收缩并不重要，对于肘屈肌、肘伸肌和背伸肌来说，该水平分别是 IS 的 50%、25% 和 40%。然而，能够实现更长时间（>15 分钟）持续收缩的水平与 MBF 直接相关。肘屈肌、肘伸肌和背部伸肌的 IS 水平分别为 22%、15% 和 20%。
The endurance during sustained contraction of elbow, flexors, elbow extensors, and back extensors was tested in 3 human subjects. The force level used was varied between ca. 15 and ca. 75% of maximal isometric strength (IS). The clearance of133Xe from contracting muscles was registered during and after the endurance test. In this way it was possible to determine whether muscle blood flow (MBF) was increased or had stopped during the contraction. Experiments with artificial ischaemia of the upper arm together with MBF measurements showed that MBF was of no importance for continuing sustained contractions above a certain force level, which was 50, 25, and 40% of IS for elbow flexors, elbow extensors and back extensors, respectively. However, the level where longer lasting (>15 min) sustained contraction is possible is directly related to MBF. These levels were 22, 15, and 20% IS for elbow flexors, elbow extensors, and back extensors, respectively.