In this guy's case, he tried exercise. Various types. He biked to work. It still didn't fix things.
His problem was cold. There's probably not much else that could fix that.
What I've learned in the past two years of intense PT is the most important thing is to focus on fixing muscle imbalance through strengthening (specifically, avoiding upper crossed and lower crossed syndromes). These put the body in a better position and reduce the load on neck muscles, which in turn reduce referred pain and muscle tightness into the arms and wrists. Most RSI-like symptoms are actually problems starting in the neck.
Having a well-balanced body that is durable is an amazing protector against all sorts of poor physical environments. The article alludes to this by saying 'improve your posture', but that's not very specific - posture improves when you have better balance between muscle groups.
Of course, improving ergonomics, body mindfulness, getting adequate rest, temperature, etc are important as well, but those alone don't do it, nor does cardio.
General gym workouts help, so long as I use weights and machines with care. But I have gone back biking after forgetting about the wrist pain, only for it all to come back and become chronic again.
After I had my tennis elbow due to overwork at the computer, and many months in PT, I learned my lesson: Go work out regularly.
It's worked out great. Better health metrics, stronger muscles, etc.
And then I had ergo pains again. And again.
So I unlearned my lesson.
Exercise does great things for me. Solving my ergo related pains? No.
I promise you that exercise is not much of a cure. By all means, go do it because you should anyway. But don't go to sleep thinking it is a solution.