Kilbom A, Persson J
Circ Res. 1981 Jun;48(6 Pt 2):I93-7.
The cardiovascular response to combined static handgrip at 20% MVC and dynamic leg exercise was studied in young male subjects. Cardiac output increased by 2.3 liters/min (30%) at isolated handgrip and by 1.0 liter/min (7%) when handgrip was added to dynamic exercise at 100 W. In spite of an increased arterial blood pressure, leg blood flow was unaffected by handgrip, both when it was performed isolated and in combination with dynamic exercise. Temperature measurements in mixed venous blood and subcutaneous tissue indicated an increased blood flow to peripheral circulatory areas. During combinations of handgrip and dynamic exercise at different levels of VO2, heart rate response to handgrip was progressively less marked as maximal oxygen uptake was approached. Therefore a vagal withdrawal seems to be the most important heart rate-increasing mechanism during combined exercise. Systolic blood pressure response to handgrip was still preserved at 25 and 45% of max VO2. At 95% of max VO2, the blood pressure response to handgrip was abolished, probably due to a competitive utilization of the same blood pressure-raising mechanism in dynamic and static exercise.
在年轻男性受试者中研究了在20%最大自主收缩（MVC）下的静态握力与动态腿部运动相结合时的心血管反应。单独进行握力时心输出量增加2.3升/分钟（30%），当在100瓦的动态运动中加入握力时心输出量增加1.0升/分钟（7%）。尽管动脉血压升高，但无论是单独进行握力还是与动态运动相结合时，握力对腿部血流均无影响。混合静脉血和皮下组织的温度测量表明外周循环区域的血流增加。在不同VO₂水平下进行握力与动态运动相结合时，随着接近最大摄氧量，握力引起的心率反应逐渐不明显。因此，在联合运动期间，迷走神经撤离似乎是最重要的心率增加机制。在最大VO₂的25%和45%时，握力引起的收缩压反应仍然存在。在最大VO₂的95%时，握力引起的血压反应消失，这可能是由于动态和静态运动中相同的血压升高机制存在竞争性利用。
