Sports can significantly reduce risk of breast cancer
Posted Dec 05 2008 9:12am
A recently released study found that regular physical activity can significantly reduce the risk of cancer among women, but reducing the hours of sleep can ruin the benefits of exercise.
The study, conducted over a long period with 6,000 U.S. women found that women who play intense sports have 25% less risk of developing cancer than those with low levels of physical activity.
“We think it’s quite interesting and intriguing. It’s kind of a first look into this. It isn’t something that has been widely studied,” explained the study’s principal author, James McClain, a specialist in prevention, the National Cancer Institute, in United States.
"However, it is still unknown why the sport reduces the risk of cancer, but researchers think that this is due to body weight and hormone levels and immunological disorders associated with physical activity.
Scientists also have no explanation for the beneficial effects of sleep on health, despite the lack of sleep is often associated with a significant risk of heart disease, obesity and diabetes.
Another study released earlier this month, suggested that women who regularly sleep less than 6 hours or less at night, may be increasing the risk of getting breast cancer by more than 60%.
The study, conducted by a team from the Tohoku University Graduate School of Medicine in Sendai, Japan, was published in the academic journal British Journal of Cancer.
The researchers believe that the relationship between sleep and cancer may be in the hormone melatonin, produced by the brain during sleep to regulate the body’s internal clock. Melatonin would have a major role in the prevention of breast cancer by controlling the quantities of sex hormones that are released."