Women who smoke may be able to reduce their lung cancer risk with exercise, a
new study shows. But the investigators caution that any relative benefit is
dwarfed by the benefits gained from kicking the habit.
In the study, women
who reported high levels of physical activity were 23 percent less likely to
develop lung cancer than those who were the least active, report Dr. Kathryn H.
Schmitz of the University of Pennsylvania in Philadelphia and colleagues. And
among women who smoked, greater activity was tied to a 28 percent lower lung
cancer risk, while women who were ex-smokers showed a 37 percent lower risk with
smokers remained at much higher risk of lung cancer than those who had never
smoked, or those who had quit, Schmitz and her team note. “Quitting smoking is
the single most important action a smoker can take to reduce risk of lung
cancer,” they note.
investigating the effect of exercise on lung cancer risk have had mixed results.
To better understand the relationship, they looked at 36,929 women participating
in the Iowa Women’s Health Study who were followed from 1986 to 2002. Those who
reported participating in vigorous activity at least twice a week, or moderate
activity more than four times weekly, were classified as having a high physical