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Effect of aging on peripheral circulatory responses to regional exercise.

衰老对局部运动外周循环反应的影响。

基本信息

批准号：
06680124
负责人：
KAGAYA Atsuko
金额：
$ 1.34万
依托单位：
Research Institute of Physical Fitness
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

Effect of aging on peripheral responses to static and dynamic handgrip exercise was determined. Dop pler ultra-sound method was used to determine brachial arterial blood flow during exercise. Blood pressure (Finapres) and heart rate were measured.The results obtained were summarized as follows ;1. Blood pressure response to 60-s static handgrip exercise in middle-aged women (42.2 yrs) increased linearly related to exericise intensity and was elevated higher that that in young women (22.2). The blood pressure increased more steeply from lower intensity in middle-aged women.2. Brachial arterial blood flow increased with exercise intensity during dynamic handgrip exercise and leveled off at around 30%MVC, which will mainly depend on the muscled blood flow through the fore arm.3. Maximal exercise-induced blood flow through brachial artery was studied on young (N=10), middle-aged (N=5) and old-aged (N=5) women. There was no significant difference among those maximal values obtraied during dynamic handgrip exercise.However, the blood pressure during exercise increased with age and the calculated vascular conductance was significantly lower in old-aged women, Though no significant reduction was found in middle aged women compared with that of young women.4. In comclusion, the maximal blood flow during exercise recruiting small muscle mass in old women will be maintained at the similar level as middle- and young women by increasing blood pressure. How ever, the vascular conductance was decreased in older women.

确定了年龄对静态和动态握力运动的外周反应的影响。多普勒超声法测定运动时肱动脉血流量。测量血压（Finapres）和心率。中年女性（42.2岁）对60秒静态握力运动的血压反应与运动强度呈线性相关，且高于年轻女性（22.2岁）。中年女性血压从低强度开始升高的幅度更大.动态握力训练时，肱动脉血流量随运动强度的增加而增加，在30%MVC左右趋于稳定，主要依赖于前臂肌肉血流量.对10名青年、5名中年和5名老年女性肱动脉最大运动血流量进行了研究。动力性握力运动时血压最大值之间差异无统计学意义，但随着年龄的增长，运动时血压逐渐升高，计算的血管传导性老年女性明显低于青年女性，而中年女性与青年女性相比无明显降低.结论：老年女性小肌群运动时最大血流量可通过提高血压维持在与中青年女性相似的水平。但老年妇女的血管传导性降低。