McMurray R G, Katz V L, Berry M J, Cefalo R C
Physical Education Department, University of North Carolina, Chapel Hill 27514.
Am J Obstet Gynecol. 1988 Mar;158(3 Pt 1):481-6. doi: 10.1016/0002-9378(88)90009-9.
To examine the effects of advancing pregnancy on metabolic responses, 12 women, who were recruited early in pregnancy, were studied during 20 minutes of immersion in 30 degrees C water, followed by 20 minutes of exercise in the water (60% of predicted maximal capacity) and 20 minutes of lateral supine recovery. Each subject completed the trials during the fifteenth, twenty-fifth, and thirty-fifth weeks of pregnancy, as well as a control period 8 to 10 weeks post partum. Resting oxygen uptake increased with advancing pregnancy. Resting oxygen uptake was higher in the water than on land but was not altered by pregnancy. Exercise oxygen uptakes were similar for all trials, but the work load required to elicit the VO2 decreased during the thirty-fifth week of pregnancy. Exercise heart rates followed the same pattern as oxygen uptake. Lactate concentrations declined with advancing pregnancy after exercise. Blood glucose levels were normal for pregnancy but declined slightly during exercise. Blood triglyceride levels were elevated with exercise, with a tendency to increase with advancing pregnancy. Resting plasma cortisol concentrations increased with pregnancy but remained lower during immersion and exercise. These results suggest that pregnancy significantly alters metabolic responses to exercise in the water.
为研究孕期进展对代谢反应的影响，选取了12名在孕早期招募的女性，让她们在30摄氏度的水中浸泡20分钟，随后在水中进行20分钟的运动（达到预测最大能力的60%），并进行20分钟的侧卧仰卧恢复。每位受试者在妊娠的第15、25和35周完成这些试验，以及产后8至10周的对照期。静息摄氧量随孕期进展而增加。静息摄氧量在水中高于在陆地上，但不受妊娠影响。所有试验的运动摄氧量相似，但在妊娠第35周时，产生VO₂所需的工作量降低。运动心率与摄氧量遵循相同模式。运动后乳酸浓度随孕期进展而下降。血糖水平在孕期正常，但在运动期间略有下降。血液甘油三酯水平随运动而升高，并有随孕期进展而增加的趋势。静息血浆皮质醇浓度随妊娠增加，但在浸泡和运动期间仍较低。这些结果表明，妊娠显著改变了对水中运动的代谢反应。
