Exercise is Good for the Fetus

May conducted a study of the effects of maternal exercise on the fetus. Comparing sedentary pregnant women to those who engage in moderate-intensity aerobic exercise for at least thirty minutes three times a week, May found that fetuses show the same beneficial effects of cardiovascular training as do their physically active mothers: their heart rates are significantly lower, and their heart-rate variability is greater, than those of fetuses of mothers who don’t exercise. [...] Exercise m...