Alex Oleynik won't be retiring any time soon. At 40, this Russian MMA champion revealed the secret of his longevity in combat sports.The forty-year-old simply has an irreproachable lifestyle. He trains a lot, is very careful about what he eats: lean meats and vegetables.Most importantly, he makes sure to get enough rest because, having children, he can't always sleep through the night. So, he takes naps during the day.Between fights, Alex makes sure to get out of his bubble and enjoys spending time with his family and friends. In short, he has the ideal lifestyle for a career that is one of the longest we've ever seen. Turns out staying in shape is as simple as that.Check out the video above to see more of Alex for yourself!