Regular exercise has been found to be a key factor in maintaining crucial vitamin D levels during the winter months, according to a new study published in Advanced Science by researchers from the University of Bath, University of Birmingham, and University of Cambridge. The study focused on individuals with overweight and obesity and found that those who participated in a 10-week indoor exercise program experienced significantly smaller drops in vitamin D levels compared to those who did not exercise, even though their body weight remained stable.
The exercise program consisted of four sessions per week, including two treadmill walks, one longer steady-state bike ride, and one high-intensity interval bike session. The results showed that exercise helped preserve the body’s active form of vitamin D, known as 1,25(OH)â‚‚D₃, which plays a crucial role in supporting bone health, the immune system, and various organs. This active form of vitamin D was maintained at healthy levels in the exercising group, while it decreased in the non-exercising group.
Lead author Dr. Oly Perkin emphasized the importance of the findings, stating that exercise alone can protect against the winter dip in vitamin D. The study also debunked the notion that vitamin D supplements alone can maintain the active form of the vitamin, highlighting the unique benefits of regular exercise.
Key findings from the study include:
– Participants who exercised saw a 15% drop in overall vitamin D levels over winter, compared to a 25% drop in the non-exercising group.
– The active form of vitamin D was preserved in the exercising group, while it decreased by 15% in the non-exercising group.
– The effect was attributed to exercise, not weight loss, as participants’ weight remained stable throughout the study.
The study was conducted during the winter months when natural vitamin D production from sunlight is minimal, and participants were asked to avoid supplements to ensure accurate results. Previous research from the same team showed that a single workout can temporarily boost vitamin D levels, but this study demonstrated that regular cardio exercise can maintain basal circulating vitamin D levels and provide lasting protection during the winter.
With over 50 adults participating in the randomized controlled trial, the study provides compelling evidence that exercise can be an effective strategy for maintaining vitamin D levels in winter, especially for individuals with overweight or obesity. Participants in the study expressed satisfaction with the results, highlighting the positive impact of exercise on their health.
In conclusion, the researchers suggest that policymakers and healthcare professionals should consider incorporating exercise into strategies to improve vitamin D status and metabolism during the winter months. The study underscores the importance of regular physical activity in maintaining overall health and well-being, offering a natural and effective alternative to vitamin D supplements.
