The effects of thigh muscle strength physical activity and menstrual cycle on the orthostatic tolerance in young adult women

大腿肌力体力活动和月经周期对年轻成年女性直立耐受力的影响

• 批准号: 13680069
• 负责人: HIRATA Mari
• 金额: $ 2.18万
• 依托单位: Osaka International University (2002)Osaka International University for Woman (2001)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13680069/
• 关键词: Young women; Bleed pressure regulation; Postural change; Thigh muscle strength; 姿勢変換; 血圧調整; 姿勢変化; 下肢筋力

We examined the relationship between the orthostatic tolerance to 60° head ? up tilt of 10 minutes and three factors - maximum thigh muscle strength, maximum aerobic power and body size - in 32 young women.Using the relative change in the thoracic impedance upon standing, impedance being an indicator of blood volume, the subjects were divided into three groups : one group of 17 had significant decrease in blood volume (called the decrease group) ; the second group of 10 showed a decrease in blood volume followed by recovery starting after the first one minute (called the recovery group) ; the third group of 5 had a minor change of blood volume (the mildly affected group). Most of the women with strong thigh muscle were classified in the recovery group, the members of which tended to have larger body size and higher thigh muscle strength.No difference in blood pressure in the supine position was recorded among the three groups. Women in the decrease group and the mildly affected group h … More ad a tendency to have higher blood pressure in the upright position than the supine position. In the recovery group, however, blood pressure was lower in the upright position than the supine position, and the relative changes in the diastolic and mean blood pressure upon standing were significantly less than those of the other two groups. Thigh muscle strength had a negative correlation with relative changes in both the diastolic and mean blood pressure in the supine position. Women with strong thigh muscle tended to have lower blood pressure in the upright position than the supine position. These results suggest that the change in blood pressure upon standing for 10 minutes depends on the change in blood volume in the chest, which happens within 1 minute of changing position. The constriction of the stronger antigravity muscle increases significantly the venous return just after standing ; but upon standing, it seems to influence blood pressure regulation mediated by the cardiopulmonary receptor, causing decrease in blood pressure.The maximum aerobic power had no relationship with changes in blood pressure in the upright position. Less

我们研究了立位耐力与60°头？本文对32名青年女性进行了10分钟的直立倾斜和最大大腿肌力、最大有氧功率和体型三个因素的测试，以胸阻抗作为血容量的指标，将受试者分为三组：一组17人，血容量明显减少第二组10人显示血容量减少，然后在第一分钟后开始恢复（称为恢复组）;第三组5人血容量有轻微变化（轻度影响组）。大部分大腿肌肉强壮的女性被归类为恢复组，这组成员往往有更大的体型和更高的大腿肌肉力量。三组之间仰卧位的血压没有差异。减少组和轻度影响组的妇女h ...更多信息 以及在直立位置比仰卧位置具有更高的血压的趋势。然而，在恢复组中，直立位的血压低于仰卧位，站立时舒张压和平均血压的相对变化显著小于其他两组。大腿肌肉力量与仰卧位舒张压和平均血压的相对变化呈负相关。大腿肌肉发达的女性直立位的血压往往比仰卧位低。这些结果表明，站立10分钟后血压的变化取决于胸部血容量的变化，这发生在改变位置的1分钟内。较强的抗重力肌收缩后即刻显著增加静脉回流，但站立后似乎影响心肺感受器介导的血压调节，导致血压下降，最大有氧功率与直立位血压变化无关。少