quotes a report from BBC:
Want to live longer? Reduce your risk of cancer? And heart disease? Then cycle to work, say scientists. The five-year study of 250,000 UK commuters also showed walking had some benefits over sitting on public transport or taking the car. Published in the British Medical Journal (BMJ) today, the University of Glasgow study compared those who had an “active” commute with those who were mostly stationary. Overall, 2,430 of those studied died, 3,748 were diagnosed with cancer and 1,110 had heart problems. But, during the course of the study, regular cycling cut the risk of death from any cause by 41%, the incidence of cancer by 45% and heart disease by 46%. The cyclists clocked an average of 30 miles per week, but the further they cycled the greater the health boon. However, the effect was still there even after adjusting the statistics to remove the effects of other potential explanations like smoking, diet or how heavy people are.
via Slashdot
Cycling To Work Can Cut Cancer and Heart Disease