As long as it is with a boxing bag, I think it is fine. If you are sparing with another person, it has been proven to be hard on the brain.
Of course, it wonderful cardio, and it works wonders for stress and anger relief.
Anything is a good hobby, as long as you enjoy it. That's why it's a hobby. :)
if your looking for a flat nose and cauliflower ears ,,, it's brilliant .....
It helps you with self defense
Sure, why not?