Two things.

1. And the most important one. My guitar teacher taught me that. Whenever I feel pain in my wrists, hands or fingers I stop, no matter what. I take a break, see how it goes afterwards and if it’s not better I stop doing what I did for the rest of the day. Of course sometimes it’s important work stuff that needs to be done. As for me, most of the times it’s my right hand that hurts from mouse useage, I switch sides and get urgent things done, but still stop afterwards.
2. Sports, as usually, building up muscles in my hands and arms helps me personally. Not sure if there is scientific evidence for that.

But yea, number 1 is the most important thing, no job is worth having pain for the rest of your life.

Additionally I like roundtrip tests.

For example we have two data formats and support conversion between both of them.

So I have tests that convert from A to B and back to A. Then I can go and call assertEquals on them.

It’s a very cheap test, that tests all functionality of the conversion itself.

While I agree with a lot of things you said I disagree with pushing boundaries.

People that are really interested in him will find a different topic to bond, it’s not like music is the only thing on earth.

Also it’s okay to be the fun break, it’s a chance to get feedback about that and realize you need to find a different social circle that fits better to your own life. Or figure you push your boundaries yourself if you really want to belong.

But nobody has to fit in everywhere and if his boundary is his taste in music then who are we to question that?

That’s just wrong. If you try to push your kids limits without teaching them respecting boundaries and talking to other people respectfully, things like the guy in this picture will happen.

It’s okay to have boundaries and we have to teach kids to communicate them in a respectful, firm and friendly manner.

Why do you want to do anything at all? How about respecting his boundaries? That would be good start.