Originally published in Men’s Journal March 17, 2015) Ever wonder what would happen if you stopped working out? A new study on identical twins published in the journal Medicine & Science in Sports & Exercise explores exactly that, and the results are dramatic.In the study, Finnish researchers looked at 10 pairs of identical twin men. Each set of twins was in their mid-30s, and each had been brought up in the same household. Since they were identical, they also shared the same DNA. The only difference was that though they had maintained the same level of physical activity for most of their lives, one twin had cut way back on exercising in the past few years due to work or family pressure; on average, the active twin worked out at least twice a week, while the less active twin exercised less than twice a week. The research team put each twin through a host of medical tests to get a sense of their overall health.Read the rest of the article here.