Originally Posted by MadcapMaxie
When I first started boxing all I did before hand was lift weights I had alot of strength and a big punch but it didn't mean shit when after 1 round of lively sparring I was knackered. Nowadays I've barely touched a weight in over 2 years yet can still lift more weights than I could before simply by body weight exercises, but my stamina and speed has notably increased. Then again like you said, variety is the best thing you can do for your body to keep it guessing, I've noticed recently that adding Rowing to my regime on top of all the calisthenics, swimming, running and boxing has helped alot.
actually, a friend of mine
is a boxer, also does bjj a bit
and he does mainly bodyweight stuff
but he can decent weights in the gym
so yeah not everyone is the same