It is often said that in gymnastics that gymnasts usually peak between the ages of 16-19. A lot of this has to do with the extreme wear and tear on the joints that intense gymnastics practice causes. This is especially pronounced because of the intense training regimens that many gymnasts go through while their bodies are still growing and hence more vulnerable to injury. Gymnasts show an increased risk for osteoporosis, osteoarthritis, and chronic joint pain, and some professional gymnasts even exhibit stunted puberty due to the intense training and have to take hormone supplements after they retire to go through puberty properly. And of course the aches and pains of growing older tend to make gymnastics a young person's sport. This is true of every sport or job that requires intense physical activity, but tends to be worse for gymnasts because they start training so young.
My question is what would happen to a hypothetical gymnast who exhibited a degree of superhuman durability and ability to recover from injury, and how would it affect their ability to perform? I'm not talking about a Superman-level flying brick or a Wolverine level to regrow limbs, but a minor improvement over the baseline human condition. More like "peak human" or slightly above that than anything else. A lot of problems you see in athletes can be attributed to the fact that many parts of our body, such as our cartilages, aren't very resilient to stress and don't heal very well. Would the ability to recover from injuries that would force regular athletes to retire given sufficient time and a longer career of activity make older individuals better and more skilled gymnasts than younger ones because they have more experience and instinctively know how their body handles better? Would older gymnasts be able to more reliably perform feats that less experienced individuals couldn't? Or is there a ceiling on gymnastic ability due to growth or other factors that no amount of experience or superhuman durability could circumvent that would allow older individuals from being able to perform gymnastic feats on a similar level to teenagers (even admitting that Oksana Chusovitina being an Olympic athlete is a thing)?