Jovanovic L, Kessler A, Peterson C M
J Appl Physiol (1985). 1985 May;58(5):1719-22. doi: 10.1152/jappl.1985.58.5.1719.
Six healthy active women in the third trimester of pregnancy participated in a graded exercise protocol to levels of exertion perceived to be equivalent to that of their usual exercise regimen. Fetal heart rate response (FHR) was documented by ultrasound transducer and confirmed (n = 1) by ultrasonic visualization. Resting maternal O2 consumption was 277 +/- 50 (SD) ml/min and rose to 1,132 +/- 202 ml/min at a mean final exercise intensity of 79 +/- 9 W after 12.8 +/- 1.7 min on a cycle ergometer. There was no significant change in maternal serum insulin, growth hormone, glucose, or pH values. Maternal leukocyte count, hemoglobin, and venous lactate levels rose significantly during the exercise (P less than 0.05). FHR prior to exercise was 142 +/- 4 beats/min and decreased to 84 +/- 34 beats/min during exercise. The decrease in FHR was documented within 1 min of initiating exercise in all cases. During exercise, fetal movements were not accompanied by FHR accelerations. Within 1 min following the cessation of exercise, FHR rose to 143 +/- 8 beats/min and fetal movements were accompanied by FHR accelerations. Since the recovery of FHR occurred immediately after cessation of maternal exercise, this level of maternal exercise does not appear to be harmful to the fetus.
六名处于妊娠晚期的健康活跃女性参与了一项分级运动方案，运动强度达到她们认为等同于其日常运动方案的水平。通过超声换能器记录胎儿心率反应（FHR），并通过超声可视化确认（n = 1）。静息时孕妇的耗氧量为277±50（标准差）ml/分钟，在踏车测力计上运动12.8±1.7分钟后，平均最终运动强度为79±9瓦时，耗氧量升至1132±202 ml/分钟。孕妇血清胰岛素、生长激素、葡萄糖或pH值无显著变化。运动期间孕妇白细胞计数、血红蛋白和静脉乳酸水平显著升高（P<0.05）。运动前FHR为142±4次/分钟，运动期间降至84±34次/分钟。所有病例在开始运动后1分钟内均记录到FHR下降。运动期间，胎儿活动未伴有FHR加速。运动停止后1分钟内，FHR升至143±8次/分钟，胎儿活动伴有FHR加速。由于孕妇运动停止后FHR立即恢复，这种运动水平似乎对胎儿无害。
