Hai Ha

If a woman develops breast cancer, having larger breasts and being sedentary might increase her risk of dying from the disease, a large, giam can an toan sau sinh nhu the nao long-term study suggests.

Experts have long known that being physically active reduces the risk of getting breast cancer by about 25 percent. The new study, however, looked at how both exercise and breast size might predict survival if breast cancer does develop, said study researcher Paul Williams, a staff scientist at the Lawrence Berkeley National Laboratory, in Berkeley, Calif.

Williams found a roughly 40 percent reduced risk of dying from breast cancer in physically active women compared to those who didn’t meet exercise guidelines.

The study was published online Dec. 9 in the journal PLoS One.

For the study, giam can cap toc,hieu qua Williams and his team followed nearly 80,000 women for 11 years. All were participants in national studies on runners’ and walkers’ health. About 33,000 of the women were walkers and about 46,000 were runners.

When they entered the study, none of the women had been diagnosed with breast cancer. All reported the distances they walked or ran each week, as well as their bra cup size and body weight and height.

During the 11-year follow-up period, 111 study participants died from breast cancer. They were in their mid-50s, on average, when they died.

Those who met current exercise guidelines were about 42 percent less likely to die of breast cancer compared to those who did not meet the guidelines. These guidelines recommend two and a half hours of moderate activity, an hour and 15 minutes of vigorous activity or an equivalent combination weekly.

The amount of exercise found to be protective against breast cancer was about seven miles of brisk walking or nearly five miles of running each week. “It’s not a lot of exercise,” Williams said.

“This is more evidence of yet another benefit of exercise,” Williams said. “We didn’t seem to find a difference between walking and running.”

Women pressed for time might opt for running over walking, Williams said. cach g