Well Tuor, this is exactly the age when you start to notice that you've stopped growing, and started ageing.
That is unless you live a very healthy lifestyle, get loads of exercise, and have the genetic predisposition to stay healthy. I can still remember the first time when I hurt my back trying to lift something, nearly 2 years ago. My back has never fully recovered from that. That's what your life starts being all about at some point, just trying not to break anything, because once broken, even if you try and fix it to make it better, it will keep coming back to haunt you whenever you let your guard down.
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