Cardiovascular response to cycle exercise during and after pregnancy.
Cardiovascular response to cycle exercise during and after pregnancy.
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怀孕期间和怀孕后心血管对自行车运动的反应。
DOI：
10.1152/jappl.1989.66.1.336
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
Coustan,DR
中科院分区：
文献类型：
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作者：
Sady,SP;Carpenter,MW;Thompson,PD;Sady,MA;Haydon,B;Coustan,DR
我们的目的是确定怀孕是否会改变心血管对运动的反应。39名女性[29 +/- 4（SD）岁]在妊娠期间（产前，AP，妊娠26 +/- 3周）和产后（PP，8 +/- 2周）进行了次最大和最大运动踏车测力计。AP和PP的最大摄氧量（VO 2 max）和最大心率（HR）均无差异（VO 2 = 1.91 +/- 0.32和1.83 +/- 0.31 l/min; HR = 182 +/- 8和184 +/- 7次/min，P均大于0.05）。心输出量（Q，乙炔再呼吸技术）平均2.2至2.8升/分钟高AP（P <0.01）在休息和每次运动负荷。HR和每搏输出量（SV）的增加有助于在较低运动负荷下Q的升高，而SV的增加主要是在较高水平下Q的升高。Q与VO 2关系的斜率与AP和PP无差异（6.15 +/- 1.32和6.18 +/- 1.34 l/min Q/l/min VO 2，P> 0.05）。与此相反，动静脉氧差（a-vO 2差）在每个运动负荷AP较低，表明较高的Q AP分布到非运动血管床。我们的结论是，Q是更大的和a-vO 2的差异是在所有水平的运动在怀孕的受试者比在同一妇女产后，但耦合的增加Q的增加全身O2需求（VO 2）是没有什么不同。（250字处删节）
Our purpose was to determine if pregnancy alters the cardiovascular response to exercise. Thirty-nine women [29 +/- 4 (SD) yr], performed submaximal and maximal exercise cycle ergometry during pregnancy (antepartum, AP, 26 +/- 3 wk of gestation) and postpartum (PP, 8 +/- 2 wk). Neither maximal O2 uptake (VO2max) nor maximal heart rate (HR) was different AP and PP (VO2 = 1.91 +/- 0.32 and 1.83 +/- 0.31 l/min; HR = 182 +/- 8 and 184 +/- 7 beats/min, P greater than 0.05 for both). Cardiac output (Q, acetylene rebreathing technique) averaged 2.2 to 2.8 l/min higher AP (P less than 0.01) at rest and at each exercise work load. Increases in both HR and stroke volume (SV) contributed to the elevated Q at the lower exercise work loads, whereas an increased SV was primarily responsible for the higher Q at higher levels. The slope of the Q vs. VO2 relationship was not different AP and PP (6.15 +/- 1.32 and 6.18 +/- 1.34 l/min Q/l/min VO2, P greater than 0.05). In contrast, the arteriovenous O2 difference (a-vO2 difference) was lower at each exercise work load AP, suggesting that the higher Q AP was distributed to nonexercising vascular beds. We conclude that Q is greater and a-vO2 difference is less at all levels of exercise in pregnant subjects than in the same women postpartum but that the coupling of the increase in Q to the increase in systemic O2 demand (VO2) is not different.(ABSTRACT TRUNCATED AT 250 WORDS)