By Kelly Bonyata, IBCLC
Does exercise affect milk supply or nutrient content?
No. Studies have shown no difference in the volume or composition of the milk or babies' weight gain. One study showed a slight increase in milk supply for the women who exercised regularly, but because of the small size of the study this increase may not be significant.
Does lactic acid increase in breastmilk after exercise?
Research has not shown a noticable increase in lactic acid buildup after moderate exercise (50% & 75% intensity). The lactic acid in breastmilk does increase somewhat if mom exercises to maximum (100%) intensity, also described as exhaustive exercise. This increase may be present up to 90 minutes post-exercise. There are no known harmful effects for the baby.
Will baby refuse the breast after mom exercises?
Most studies have found no difference in acceptance of the breast, even after maximum intensity exercise.
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