Traditionally, the importance of breastfeeding has been discussed mainly in the context of the infant’s health. However, according to recent studies, lactation is also beneficial for the mother and positively impacts her well-being in the years following childbirth. Research using Magnetic Resonance Imaging (MRI) has provided new data on how the duration of lactation affects the mother’s musculoskeletal system and metabolic health. These results are particularly important for the prevention of osteoporosis, sarcopenia (loss of muscle mass), and metabolic disorders in the later stages of a woman’s life.
Study Details:
Researchers used an advanced MRI method (CSE-MRI) which allows for the non-invasive assessment of the Proton Density Fat Fraction (PDFF)—mainly an indicator of fat content—in the vertebral bone marrow and paraspinal muscles.
Based on previous studies, it was known that an increase in fat in the bone marrow is linked to a decrease in Bone Mineral Density (BMD) and the risk of osteoporosis. Although breastfeeding temporarily affects bone mineralization (due to hormonal factors and calcium transfer), its long-term effect on fat distribution and the “quality” of muscle tissue remained unclear to the scientific community.
The study included 37 premenopausal women (some with a history of Gestational Diabetes Mellitus – GDM) who were observed for a period ranging from 6 months to 5 years postpartum.
Women whose lactation duration exceeded 8 months showed a significantly reduced fat infiltration in the bone marrow and muscle tissue compared to the group who breastfed for a shorter period ( months).
These results indicate that prolonged breastfeeding contributes to the optimal regeneration of the musculoskeletal system and improves the metabolic profile, which is a critically important factor for the prevention of chronic pathologies.
Key Results:
The Long-Duration Breastfeeding (BF) group also recorded an increase in the Cross-Sectional Area (CSA) of the muscle, suggesting an improvement in muscle mass and a reduction in atrophy.
Prolonged breastfeeding was associated with an improvement in glucose metabolism, manifested by lower insulin resistance and higher insulin sensitivity. Accordingly, the risk of developing metabolic syndrome was significantly reduced in these women.
It was found that the longer the breastfeeding period, the lower the fat accumulation in the muscles. This link supports the preventive role of prolonged BF in the development of sarcopenia.
Study Limitations
The main limitations of the study include: a relatively small study sample size; the absence of pre-pregnancy MRI data; the non-use of standard assessment methods for Bone Mineral Density (BMD); the inability to clearly differentiate between exclusive (only breast milk) and partial breastfeeding. Additionally, important factors such as the restoration of the menstrual cycle and dietary specifics, which could potentially influence the final results, were not accounted for.
Large-scale longitudinal studies are needed to confirm these associations and study the physiological mechanisms in depth. Integrating PDFF MRI metrics with standard measures of bone density may improve the prediction of osteoporosis risk and facilitate the development of personalized preventive strategies.
Source: European Journal of Radiology
