Current and ex smokers may lower lung cancer risk with exercise

Researchers gave treadmill tests to 2,979 men - 1,602 who were former smokers and 1,377 who were current smokers - to assess their"cardiorespiratory" fitness, or how easily the circulatory and respiratory systems can supply oxygen to muscles during physical exertion. They assessed exercise capacity using a standard measurement known as metabolic equivalents which reflects how much oxygen is consumed during physical activity.Researchers followed the men for an average of 11.

"Both former and current smokers can significantly reduce their risk of developing and dying from lung cancer by achieving higher cardiorespiratory fitness," said lead study author Baruch Vainshelboim of the Veterans Affairs Palo Alto Health Care System and Stanford University in Palo Alto, California.

While the study can't prove whether or how improving aerobic fitness might directly reduce the odds of developing or dying from lung cancer, the results still point to one modifiable risk factor that current and former smokers might be able to control to reduce their risk, researchers conclude.

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