Can exercise be replaced with a pill?

Everyone knows that exercise improves health, and ongoing research continues to uncover increasingly detailed information on its benefits for metabolism, circulation, and improved functioning of organs such as the heart, brain, and liver. With this knowledge in hand, scientists may be better equipped to develop "exercise pills" that could mimic at least some of the beneficial effects of physical exercise on the body. But a review of current development efforts, publishing October 2 in Trends in ...