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Circulatory readjustment to increased muscle groups exercising statically.

循环再调整以增加静态锻炼的肌肉群。

基本信息

批准号：
08680141
负责人：
KAGAYA Atsuko
金额：
$ 1.6万
依托单位：
Research Institute of Physical Fitness, Japan Women's Colleg of Physical Education
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08680141/
关键词：
static handgrip static plantar flexion combined exercise tissue oxygen saturation blood pressure brachial artery flow femoral artery flow 複数体肢運動血流増加静的運動掌握運動足底屈運動

项目摘要

The aim of this study was to determine the physiological mechanism whic regulated a readjustment of circulatory system, when statistically contracting muscles of different limbs worked simultaneously. Brachial arterial and femoral arterial blood flow, blood pressure, skin blood flow and muscle oxygen ation were studied during the isolated static handgrip exercise (H) or plantar flexion (P), and combined both exercises in active women. During static H or P exercise at the intensities of 15%, 30% and 45% MVC,the blood flow increased due to the elevated blood pressure. However, the active muscle oxygen saturation decreased with the increase in exercise intensity and the post-exercise hyperaemia was augmented, suggesting the insufficiency of the oxygen supply. During combined exercises, which comprised P exercise at 30% MVC and H exercise either at 15% MVC or 45% MVC,the blood pressure, femoral arterial blood flow increased significantly when H exercise was 45%MVC,but not 15% MVC.The skin blood flow did not change significantly. The femoral artery conductance did not change significantly, therefore, the increased leg blood flow during combined P exercise with H exercise at 45% MVC will be attributable to the elevated blood pressure. Despite the leg blood flow increase, the calf muscle (medial gastrocnemius) oxygenation measured by near-infrared spectroscopy did not differ significantly compared to those during isolated exercise. These results suggest that the increased blood flow during combined exercise did not contribute to increase oxygen utilization of the muscle.

本研究的目的是确定当不同肢体的统计收缩肌肉同时工作时，调节循环系统重新调整的生理机制。本文研究了运动员在单纯静态握力（H）和跖屈（P）运动以及两种运动联合进行时肱动脉和股动脉血流量、血压、皮肤血流量和肌肉氧合的变化。在15%、30%和45%MVC强度的静态H或P运动中，由于血压升高，血流量增加。然而，随着运动强度的增加，主动肌氧饱和度降低，运动后充血加重，提示氧供应不足。在30%MVC的P运动和15%MVC或45%MVC的H运动的复合运动中，当H运动为45%MVC时，血压、股动脉血流量显著增加，而15%MVC时血压、股动脉血流量无显著变化。股动脉传导性无明显变化，因此，在45%MVC的P运动与H运动组合期间增加的腿部血流量将归因于血压升高。尽管腿部血流量增加，小腿肌肉（腓肠肌内侧）的氧合测量近红外光谱没有显着差异相比，在孤立的运动。这些结果表明，在组合运动期间增加的血流量并不有助于增加肌肉的氧利用率。