Recent studies, including a prominent one by the Indian Council of Medical Research (ICMR), indicates that two common lifestyle factors—sleep duration and abdominal fat—play a meaningful role in influencing a woman’s risk of developing breast cancer. The large-scale study, published in a peer-reviewed medical journal, analysed data from thousands of women across age groups and found both factors to be independent and modifiable risks.
Researchers observed that women who regularly slept fewer than six hours a night had a notably higher risk of breast cancer compared to those getting seven to eight hours of quality sleep. Inadequate sleep disrupts hormonal regulation, particularly melatonin and estrogen, which are important for protecting breast tissue and limiting abnormal cell growth.
The study also identified central obesity as a significant concern. Women with a waist circumference above 35 inches (88 cm) showed a higher breast cancer risk, regardless of overall body weight. Excess abdominal fat increases inflammation and estrogen production, creating conditions that may promote tumour development.
Experts say the findings reinforce the importance of basic preventive habits. Maintaining regular sleep schedules, engaging in consistent physical activity, following a balanced diet, managing stress, and monitoring waist size can collectively reduce risk. Healthcare professionals are encouraged to include sleep quality and waist measurements in routine preventive discussions, particularly for women with additional risk factors.
The research highlights a clear public-health message: alongside genetics and screening, everyday choices related to sleep and body composition can significantly influence long-term breast health.
