【摘要】：目的:研究長(zhǎng)時(shí)間高溫環(huán)境運(yùn)動(dòng)對(duì)耐力自行車運(yùn)動(dòng)員高強(qiáng)度運(yùn)動(dòng)能力及血漿泌乳素(PRL),皮質(zhì)醇(C)等激素水平的影響。方法:11名男子自行車運(yùn)動(dòng)員在3個(gè)不同環(huán)境溫度(PⅠ22.4℃、PⅡ32.4℃、PⅢ37.7℃)下分別完成時(shí)間各為5周的訓(xùn)練,記錄安靜和運(yùn)動(dòng)時(shí)心率以量化運(yùn)動(dòng)負(fù)荷。每個(gè)周期的前2周耐力訓(xùn)練后進(jìn)行功率車測(cè)試(成績(jī)記為P15s,P60s,P300s),后3周混合訓(xùn)練后進(jìn)行場(chǎng)地計(jì)時(shí)運(yùn)動(dòng)能力測(cè)試(成績(jī)記為TT250m,TT1000m,TT4000m)。同時(shí)檢測(cè)晨血漿PRL、C、及睪酮(T)濃度。結(jié)果:PⅡ和PⅢ的P15s及TT250m較PⅠ有提高,差異具有統(tǒng)計(jì)學(xué)意義(P0.05,P0.01),而P60s和P300s均無顯著變化。場(chǎng)地1000m運(yùn)動(dòng)能力在PⅡ較PⅠ有顯著提高(P0.01),而在PⅢ較PⅡ反而出現(xiàn)明顯下降(P0.05)。場(chǎng)地4000 m與1000 m計(jì)時(shí)運(yùn)動(dòng)結(jié)果相似。血漿PRL濃度與環(huán)境溫度呈高度正相關(guān)(P0.01)。結(jié)論:熱應(yīng)激對(duì)15 s以內(nèi)的沖刺運(yùn)動(dòng)無不利影響,對(duì)60 s及300 s左右的高強(qiáng)度運(yùn)動(dòng)有抑制現(xiàn)象。血漿PRL與環(huán)境溫度高度正相關(guān)性,結(jié)合C濃度及T/C值變化,有利于評(píng)估機(jī)體中樞疲勞狀態(tài)。
[Abstract]:Aim: to study the effects of long time high temperature exercise on high intensity exercise ability and plasma prolactin (PRL), cortisol (C) levels in endurance cyclists. Methods: eleven male cyclists completed 5 weeks of training at three different ambient temperatures (P 鈪，

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