Yeah but on the other hand the older you get the easier you hurt yourself and the longer you take to heal up. Im getting more and longer lasting injuries in my 30s even though I dont train nearly as hard as when I was younger. To OP: It depends on your background too. If you have any kind of high level combat sports background, you should still be able to compete on a strong amateur or regional pro level. If MMA is more or less the first athletic activity you plan to take seriously, at 29, you most probably wont get past recreactional/smoker level, maybe get some fights in on the amateur circuit if you're naturally talented and your gym can get you some good matchups.