Exercise
Some experts have claimed that being active doesn’t reduce the risk of lung cancer, but other evidence suggests that it does.
One 2011 study found that physical activity plays a role in lung cancer risk reduction.
In fact, the majority of studies support the fact that total and recreational physical activity reduces lung cancer risk by 20 to 30 percent for women and 20 to 50 percent for men.
Exercise could possibly improve pulmonary function, reduce concentrations of carcinogenic agents in the lungs, enhance immune function, reduce inflammation, enhance DNA repair capacity, change growth factor levels, and possibly cause gene-physical activity interactions.
More research is needed to determine the specifics, but exercise has a huge range of health benefits and has been proven to help prevent other cancers too.