Want to turn back the clock a quarter century? You don’t need a time machine—just a consistent, rigorous commitment to fitness. We already know that exercise makes our skin age at a slower rate, and prevents cognitive decline. Now a new study has shown that people who continue to be athletic in middle age and beyond maintain a much younger 'fitness age'—an average of 25 years younger than their sedentary counterparts. What’s most exciting about this research is that many athletes in the Senior Games—the group studied—didn’t start training until middle age or later. So it’s never too late to make good on your childhood dream of becoming an Olympian. Do you find it harder to stay fit as you age? Will this new research help you stay motivated? Share your thoughts in the comments.