Researchers observed 2,795 participants in a study in Spain that tracked the influence of environmental and genetic factors in cancer prevention – especially colorectal, breast gastroesophageal, prostate cancers and chronic lymphocytic leukaemia.
The results were published in the International Journal of Cancer and it was found that people who regularly exercised in the morning between 8 am to 10 am had reduced cancer prevalence, especially for breast and prostate cancer.
This happens because the higher levels of estrogen are associated with an increased risk of breast cancer and the production of estradiol – the main estrogen hormone peaks around 7 am. Physical activity lowers the estrogen levels and helps keep the estradiol levels regulated.
A disturbed circadian rhythm has been linked to an increased risk of cancer risk and other major problems like cardiovascular disease and diabetes.
A good night’s sleep and morning exercise can help one reset the body clock and lower the risk of cancer.
According to a study published in the Journal of Physiology, people who exercised around 7 am or between 1 pm and 4 pm advanced their body clock enough that people were able to start their day earlier the next day.
On the other hand, people who exercised in the evening between 7 pm and 10 pm, delayed the body clock, which means they had a harder time getting to peak performance the next day.