Physical activity in the morning could be most beneficial against cancer

In a recent study conducted by the Barcelona Institute for Global Health together with the Department of Epidemiology at the Medical University of Vienna, researchers found that the beneficial effect of physical activity (done throughout lifetime) to reduce breast and prostate cancer risk were stronger when the activity was regularly done in the morning (8am-10am). Their paper published in the International Journal of Cancer discusses how physical activity may influence human circadian rhythms and suggests possible biological mechanisms (e.g alteration of melatonin and sex hormone production, nutrient metabolism etc). It is already established that regular physical activity throughout lifetime can reduce cancer risk and findings of the study now suggest the potential protective effects suggest the time of day is an important aspect.

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