本文選題：下體負(fù)壓　切入點(diǎn)：人的耐力　出處：《航天醫(yī)學(xué)與醫(yī)學(xué)工程》2000年01期

【摘要】：目的探討反復(fù)下體負(fù)壓暴露對(duì)人體下體負(fù)壓（ＬＢＮＰ） 耐力的影響及其與心血管功能的關(guān)系。方法１０ 名男性健康被試者進(jìn)行負(fù)壓值為－ ５０ ｍ ｍ Ｈｇ 、持續(xù)８ ｍｉｎ 的下體負(fù)壓鍛煉，每天１ 次、連續(xù)８ ｄ ，記錄心率及血壓。鍛煉前后進(jìn)行ＬＢＮＰ 耐力檢查，并測(cè)量心臟泵血功能。結(jié)果鍛煉前、后負(fù)壓最大耐受時(shí)間（ＤＮＰ） 及累積應(yīng)激指數(shù)（ＣＳＩ） 分別為：１０５８ ±２１６ ｓ，１３５４ ±２３３ ｓ；４５８３３ ±１２５４６ ｓ·ｍ ｍ Ｈｇ 、６３４３３±１３４５８ ｓ·ｍ ｍ Ｈｇ ，鍛煉前后差異顯著（ Ｐ＜ ０ ．０５） ，，心臟泵血功能呈增強(qiáng)趨勢(shì)。結(jié)論下體負(fù)壓反復(fù)暴露可提高人的下體負(fù)壓耐力，其原因之一可能在于增強(qiáng)了心肌的收縮能力，降低外周血管的順應(yīng)性，心血管系統(tǒng)對(duì)低血壓應(yīng)激的代償機(jī)制更加有效，從而提高了心水平動(dòng)脈血壓。
[Abstract]:Objective to investigate the effects of repeated lower body negative pressure exposure (LBNPs) on human LBNPs and the relationship between LBNPs and cardiovascular function.Methods Ten male healthy subjects were treated with negative pressure (-50mm Hg) for 8 min, once a day for 8 days. Heart rate (HR) and blood pressure (BP) were recorded.LBNP endurance test was performed before and after exercise, and cardiac pump function was measured.Results before and after exercise, the maximum tolerance time of negative pressure and the cumulative stress index (CSI) were 1: 1058 鹵216s (1354 鹵233sg) 45833 鹵12546 SmHg 63433 鹵13458 smHg, respectively (P < 0. 05). The blood function of cardiac pump showed a tendency to increase (P < 0. 05).Conclusion repeated exposure of lower body negative pressure can improve the endurance of lower body negative pressure, which may be due to the enhancement of myocardial contractility and the decrease of peripheral vascular compliance, and the more effective compensatory mechanism of cardiovascular system for hypotension stress.As a result, the blood pressure of the cardiac artery is raised.
【作者單位】： 第四軍醫(yī)大學(xué)航空航天生物動(dòng)力學(xué)教研室!西安710032 第四軍醫(yī)大學(xué)航空航天生物動(dòng)力學(xué)教研室!西安710032 第四軍醫(yī)大學(xué)航空航天生物動(dòng)力學(xué)教研室!西安710032 第四軍醫(yī)大學(xué)航空航天生物動(dòng)力學(xué)教研室!西安710032 第四軍醫(yī)大學(xué)航空航天生物動(dòng)力學(xué)教研室!西安710032

本文編號(hào)：1719969