Mothers are often anxious to return to exercising in the post-partum period for all the many reasons that one exercises – quiet time, stress relief, and the desire to return to ones pre pregnancy body.
Along with the desire to exercise is the concern of what exercising will to do to either ones milk supply or the milk composition.
Be’er, M., Mandel, D., et al, “The Effect of Physical Activity on Human Milk Macronutrient Content and Its Volume” looked at these two questions.
In their study the had 31 mothers who expressed their milk twice each day on 2 consecutive days. On one day an hour before and an hour after physical activity. The non-physical active day they expressed at the same time. The order was determined randomly.
Macronutrients (fat carbohydrates, protein) and energy content of the milk was analyzed.
The results from 124 milk samples of mother with moderate to high intensity physical activity indicated that maternal physical activity does not affect human milk volume or i macronutrient composition.
Be’er, m, Mandel, D. et al. (2020) The effect of physical Activity on Human Milk Macronutrient Content and Its Volume. Breastfeeding Medicine.