Clapp J F
Am J Obstet Gynecol. 1980 Feb 15;136(4):489-94. doi: 10.1016/0002-9378(80)90676-6.
In the near-term pregnant ewe, acute treadmill exercise produced significant changes in maternal and fetal parameters only with the onset of maternal exhaustion which was unrelated to the degree or duration of maternal exercise. With exercise to exhaustion the rate of both uterine and umbilical blood flow fell but uterine and umbilical oxygen uptakes were unchanged. Although maternal lacticemia developed and fetal PO2 fell no excess lactate was produced by the uteroplacental tissues or fetus. The increase in maternal heart rate during exercise was directly related to the decrease in uterine blood flow.
在近期怀孕的母羊中，急性跑步机运动仅在母羊出现疲劳时才会使母体和胎儿参数产生显著变化，而这与母体运动的程度或持续时间无关。运动至疲劳时，子宫和脐血流量均下降，但子宫和脐部的氧摄取量未变。尽管母体出现了乳酸血症且胎儿的氧分压下降，但子宫胎盘组织或胎儿并未产生过量乳酸。运动期间母体心率的增加与子宫血流量的减少直接相关。
