Moderate exercise​—even for those in their 80’s—​reverses many of the effects of aging, claim leading researchers at the University of Toronto.

For the average older person who does little more than rapid walking for 30 minutes at a time three or four times a week, it can provide 10 years of rejuvenation.” Benefits include improved heart and respiratory function, lower blood pressure, increased muscle strength, denser bones, and clearer thinking.