Styf J
Department of Orthopedics, University of Göteborg, Sweden.
Am J Sports Med. 1990 Jan-Feb;18(1):92-5. doi: 10.1177/036354659001800115.
Intramuscular pressures and muscle blood flow were measured in the anterior tibial muscle during dynamic concentric exercise in 14 subjects. Pressures were recorded by the microcapillary infusion method and muscle blood flow by the 133-Xenon clearance technique. Muscle blood flow during constant exercise decreased from 34.5 (SD = 10.3) to 10.6 (SD = 4.9) ml/100 g/min (P less than 0.001) when muscle relaxation pressure was increased from 13.5 (SD = 2.7) to 39.9 (SD = 9.0) mm Hg by external compression. Muscle relaxation pressure during exercise is the intramuscular pressure between contractions. External compression of the lower limb during exercise impedes muscle blood flow by increasing muscle relaxation pressure. The experimental model seems suitable to study the influence of external compression by knee braces on intramuscular pressure during exercise.
对14名受试者在动态向心运动期间的胫前肌进行了肌内压力和肌肉血流测量。压力通过微量毛细血管灌注法记录，肌肉血流通过133-氙清除技术记录。当通过外部压迫使肌肉松弛压力从13.5（标准差=2.7）毫米汞柱增加到39.9（标准差=9.0）毫米汞柱时，持续运动期间的肌肉血流从34.5（标准差=10.3）降至10.6（标准差=4.9）毫升/100克/分钟（P<0.001）。运动期间的肌肉松弛压力是收缩之间的肌内压力。运动期间对下肢进行外部压迫会通过增加肌肉松弛压力来阻碍肌肉血流。该实验模型似乎适合研究膝关节支具外部压迫对运动期间肌内压力的影响。
