Editorial illustration for Scientific American article, “Work It Out: More Activity = Slower Aging” by Lisa Stein. Study links exercise to greater longevity.

The telomeres of subjects who exercised the most (an average of 199 minutes weekly) were longer than those of volunteers who worked out the least (a mere 16 minutes or less a week). The discrepancy was enough, researchers wrote, to suggest that the exercise mavens were on average as much as a decade biologically younger than the slackers.