Morning exercise best suited to protect against cancer?

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Researchers at the Medical University of Vienna (MedUni Vienna) together with Spanish colleagues from the Barcelona Institute for Global Health (ISGlobal) have tried to find out what effect physical activity at different times of the day has on the risk of cancer. According to their results, significant differences may well exist here. The study results were published in the “International Journal of Cancer”.

Regular physical exercise has numerous positive effects on health, although there may well be differences in the effects depending on the time of day. For example, a recent study has shown that morning exercise may be the most beneficial in terms of reducing the risk of cancer.

“The hormone melatonin is produced by the human body mainly during the night and has been associated in some studies with a lower cancer risk,” the researchers explain. It is also known that physical activity in the afternoon or evening can shift the melatonin rhythm backwards in time.

Melatonin and the cancer risk

On 2,795 participants of the population-based multi-case control study (MCC-Spain), the research team therefore investigated “whether sporting activities in the morning can possibly reduce the risk of prostate and breast cancer more than sporting activities that take place at other times of the day”, according to a statement by MedUni Vienna.

It had become clear that “the protective effect of sport on the risk of developing prostate and breast cancer is possibly strongest when physical activity takes place in the morning from 8-10 a.m.”. This was particularly true for the risk of breast cancer in women, while the risk of prostate cancer in men was reduced to a similar extent (7-23 p.m.) even with regular evening physical activity.

In addition, the chronotype of the participants, i.e. the preferences for sleep and activity at a certain time of day, was also relevant for the effect of physical activity. Thus morning sport (8-10 o’clock) seemed particularly good for participants, who are active in principle rather against evening – so-called owl humans, report the scientists.

“The time of the physical activity can obviously affect the sex hormone and Melatoninrhythmus as well as the nutrient metabolism , describes the research team. Also with the new realizations it cannot be designated also yet exactly, at which time of day one should be best physically active, in order to lower the cancer risk optimally. However, it is generally accepted that one can reduce one’s cancer risk considerably by simply including at least 150 minutes of moderate physical activity per week in everyday life. (fp)

Physical activity lowers the risk of cancer
WashingtonNewsday Health and Wellness.

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