Key result
Moderate maternal exercise during lactation promotes cardiometabolic health without impairing milk volume or infant growth.
Why the study?
Does moderate maternal exercise during lactation improve cardiometabolic health without compromising breast milk supply or infant nutrition?
Systematic Review
Does moderate maternal exercise during lactation improve cardiometabolic health without compromising breast milk supply or infant nutrition?
Moderate maternal exercise during lactation is safe, does not compromise breast milk, and synergistically promotes maternal and infant cardiometabolic health.
BACKGROUND & AIMS: Breastfeeding is the optimal form of infant nutrition, conferring extensive benefits for both maternal and child health. Maternal physical activity likewise supports postpartum recovery, cardiometabolic health, and psychological well-being. Historical concerns have been raised about possible negative effects of exercise on breast milk composition, supply, and infant acceptance. This review synthesizes current evidence on the interplay between exercise and breastfeeding, with a focus on maternal and infant cardiometabolic health. METHODS: A structured literature search was conducted in PubMed and Scopus for the period January 2000-December 2024, using predefined keywords on breastfeeding, lactation, exercise, and maternal health. Eligible studies assessed maternal physical activity during lactation and reported outcomes on breast milk, maternal health, or infant development. Screening was performed independently by two reviewers following PRISMA guidelines. RESULTS: Moderate-intensity exercise (30-45 min per day) does not adversely affect milk volume, nutrient composition, or infant growth. Instead, it may enhance antioxidant levels in breast milk, improve lipid and hormonal profiles, and support maternal weight management. Transient lactate increases after strenuous exercise may alter milk taste, but normalize within an hour and have no clinical impact. Breastfeeding itself confers maternal cardiometabolic protection, lowering risks of hypertension, metabolic syndrome, and type 2 diabetes. Emerging data suggest maternal exercise during lactation may also influence infant metabolic programming, potentially reducing long-term risk of obesity and cardiovascular disease. CONCLUSIONS: Maternal exercise and breastfeeding are not mutually exclusive but synergistic in promoting maternal and child health. Accumulated evidence indicates that moderate maternal exercise does not compromise breast milk supply or its capacity to meet infant nutritional needs. IMPORTANCE: Healthcare providers should reassure postpartum women that moderate exercise is safe during lactation and encourage its integration into postpartum care. Future studies should explore high-intensity exercise, resistance training, and inter-individual variability to refine recommendations.
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Calcaterra et al. (2025) conducted a systematic review in Lactation and postpartum cardiometabolic health. Maternal exercise was evaluated on Breast milk volume, nutrient composition, infant growth, and maternal/infant cardiometabolic health. Moderate-intensity maternal exercise (30-45 min per day) during lactation does not adversely affect milk volume or infant growth, and synergistically promotes maternal and infant cardiometabolic health.
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