Now, this is new one!!! I guess you have no idea how good their conditioning are!!! You try to fight them after 40?!!!
Can always start something and challenge those MMA people. Or better yet, challenge one of those on the street. You want no rules, that will do it. I am sure one of them will take you up.
Better yet, Xu Xiaodung has like a bounty on his head in China for anyone that can beat him. I heard it's $10K or even more. He's NOT a very good MMA fighter, got beat already, He almost got knocked out by someone that fight like Muy Thai. Start with him first. Beat him up, and go from there. See how that end up first.
Just do it, don't make excuses. If anyone can win over MMA, they'll be famous.
Just want to show this: