Moderate exercise has no adverse effect on breastfeeding. If it is aerobic exercise such as brisk walking, aerobic exercise and jogging, it has no effect on the concentration of lactic acid in breast milk; If there is anaerobic exercise, the concentration of lactic acid in breast milk may temporarily increase (that is, temporarily increase), and it will not be sour after a short rest after exercise, and the baby's taste buds will not feel this degree of increase, which will not have any adverse effects on the baby's health.