累积与持续运动对不同性别久坐青年运动后低血压的影响

The effect of accumulative and continuous exercise on post-exercise hypotension in sedentary youth with different genders

为观察急性累积运动和持续运动后血压动态变化并探讨其性别差异,招募24名久坐青年(男女各半)随机参与3次实验:久坐对照(CON)、持续运动(CE)、累积运动(AE)。采用64%VO2max强度跑台运动,持续运动为运动1次,持续60min;累积运动为运动6次,每次10min,各次间隔1 h。测量运动前与运动后4 h内动态血压,计算血压二次差值(ΔΔSBP和ΔΔDBP)及其曲线下面积(AUC)。结果显示:(1)久坐男性运动后ΔΔSBP和ΔΔDBP均<0,且CE的ΔΔSBPAUC和ΔΔDBPAUC较AE更大;(2)久坐女性在CE和AE运动后ΔΔSBP均<0;但ΔΔDBP仅在AE运动后<0。AE的ΔΔSBPAUC和ΔΔDBPAUC较CE更大。研究认为:持续运动和累积运动均可诱导久坐青年出现运动后低血压。对于久坐男性,持续运动的运动后低血压效应更大;对于久坐女性,累积运动的运动后低血压效应更大。

This study aims to observe and compare the effects of acute accumulative exercise and continuous exercise on post-exercise blood pressure in sedentary youth with different genders,and 12 male and 12 female young sedentary adults were enrolled,who underwent three separate trials:six 10-min running bouts throughout the afternoon(AE),a single 60-min running(CE),and prolonged sitting(CON)in random order with 3~5 day intervals.Participants ran on a treadmill at 64%VO2max,and ambulatory blood pressure was measured before and 4 h after exercise,and the corrected value of blood pressure(ΔΔSBP/ΔΔDBP)and the area under the curve(AUC)were calculated.The results show that:(1)for sedentary males,ΔΔSBP andΔΔDBP were both<0 after exercise,butΔΔSBPAUC andΔΔDBPAUC were greater in CE compared to AE.(2)For sedentary females,ΔΔSBP was<0 after exercise in both CE and AE;only the AE group hadΔΔDBP<0 after exercise.ΔΔSBPAUC andΔΔDBPAUC were greater in AE.The conclusion reveals that:both AE and CE could all induce post-exercise hypotension in the sedentary youth.For the sedentary men,the post-exercise hypotensive effect was greater with CE,whereas for sedentary women,the post-exercise hypotensive effect was greater with AE.