Olesen H L, Mitchell J H, Friedman D B, Iversen H K, Secher N H
Copenhagen Muscle Research Centre, Department of Anaesthesia, Rigshospitalet, University of Copenhagen, Denmark.
Acta Physiol Scand. 1995 Apr;153(4):335-41. doi: 10.1111/j.1748-1716.1995.tb09871.x.
In eight subjects luminal diameter of the resting limb radial and dorsalis pedis arteries was determined by high-resolution ultrasound (20 MHz). This measurement was followed during rest and during 2 min of static handgrip or of one-leg knee extension at 30% of maximal voluntary contraction of another limb. Static exercise increased heart rate and mean arterial pressure, which were largest during one-leg knee extension. After exercise heart rate and mean arterial pressure returned to the resting level. No changes were recorded in arterial carbon dioxide tension, and the rate of perceived exertion was approximately 15 units after both types of exercise. The dorsalis pedis arterial diameter was 1.50 +/- 0.20 mm (mean and SE) and the radial AD 2.45 +/- 0.12 mm. During both types of contractions the luminal diameters decreased approximately 3.5% within the first 30 s (P < 0.05), and during one-leg knee extension they continued to decrease to a final exercise value 7.6 +/- 1.1% lower than at rest (P < 0.05). Thus, they became smaller than during the handgrip. After exercise resting values were reestablished. When the arterial diameter was expressed in relation to mean arterial pressure for the radial and dorsalis pedis artery was 22 +/- 3 and 28 +/- 3% lower during handgrip than the relation during rest, respectively. After one-leg knee extension both arteries reached 30 +/- 4% lower values. This study demonstrated arterial constriction in the resting limbs within the first 30 s of static exercise, and continued constriction during one-leg knee extension.(ABSTRACT TRUNCATED AT 250 WORDS)
在8名受试者中，使用高分辨率超声（20兆赫）测定了静息状态下上肢桡动脉和足背动脉的管腔直径。随后在静息状态以及在另一肢体最大自主收缩的30%强度下进行2分钟静态握力或单腿膝关节伸展过程中对这一测量值进行跟踪。静态运动增加了心率和平均动脉压，其中单腿膝关节伸展时增加幅度最大。运动后心率和平均动脉压恢复到静息水平。动脉二氧化碳张力未记录到变化，两种运动类型后自觉用力程度约为15个单位。足背动脉直径为1.50±0.20毫米（均值和标准误），桡动脉直径为2.45±0.12毫米。在两种收缩类型中，管腔直径在前30秒内均下降约3.5%（P<0.05），在单腿膝关节伸展过程中继续下降，最终运动时的值比静息时低7.6±1.1%（P<0.05）。因此，它们变得比握力时更小。运动后恢复到静息值。当将动脉直径与平均动脉压相关联表示时，握力时桡动脉和足背动脉的相关值分别比静息时低22±3%和28±3%。单腿膝关节伸展后，两条动脉的值均降低30±4%。本研究表明，在静态运动的前30秒内，静息肢体的动脉出现收缩，且在单腿膝关节伸展过程中持续收缩。（摘要截断于250字）
