38 here, things just don't heal as fast and tend to ache for weeks or months.
Enjoy your 30s to the fullest, because it gets worse and it's completely out of your control to make it better. The best you can expect in your 40s is to slow down the decline.
There is a point when significant mental and physical deterioration becomes inevitable, but for most people that's well past 50. I suspect that most people complaining about issues in their 40s haven't put sufficient focus on fitness and nutrition, or have damaged themselves though substance abuse.
https://dotwatcher.cc/race/tcr-no8?post=34p4cOKwoPRSffwYwnBw...