Regular exercise can cut your risk of cancer… but only if you also get enough sleep! That news comes from a 10-year National Cancer Institute (NCI) study involving nearly 6,000 women.
In a report to the annual conference of the American Association of Cancer Research, James McClain, Ph.D., of the NCI said that researchers aren't sure how exercise works to prevent cancer - its effects on hormone levels, the immune system and body weight may be involved - but it does seem to protect against several types of cancer including malignancies of the breast and colon. The NCI study found a significantly reduced risk of cancer overall and of breast cancer in particular among those who exercised the most.
But this advantage was wiped out among women who didn't get at least seven hours of sleep at night. McClain said the next stage of research would be to confirm the findings and investigate the connection between sleep and exercise to see how they're related to cancer prevention.
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