 Heading out for the day? You might want to leave your car at home. A new study published in the journal BMJ Public Health is highlighting the benefits of biking or walking to work. Researchers found active commuting is associated with lower risks of death than mental and physically ill health compared with inactive commuting. The greatest benefits were seen in cyclists who had about a 47% lower risk of death from any cause. S&P futures are up 8. This is CBS News.