You have pushed your body to do something it wasn't designed to do, and over time, you broke it. It's very hard to get back. You could have chosen another prof

You have pushed your body to do something it wasn't designed to do, and over time, you broke it. It's very hard to get back. You could have chosen another profession, but perhaps you'd have trouble with your knees then. I had perfect vision for years, but a few years ago, things started to get blurry. Now I have to stop working after some hours because I just can't see the screen anymore, which would have been unthinkable a few years back. It feels pretty absurd having to stop just because you can't physically see anymore what you're doing. I also do strength training and distance running – also to fight bad effects from prolonged computer use – which I guess keeps me pretty fit and healthy, but again, some part of the body might not be so happy and break down due to exercise. As an adult, one's surprisingly left mostly to one's own devices when it comes to long-term holistic health. Most things beyond medical or mental emergencies are a lot harder to figure out, with a lot of fads, quacks and charlatans along the way.