I'm a natural lean heavyweight boxer, 6ft 9ins, 17 stone, had no fights yet and when doing weight programme I can push and pull the weights the same weight as other fighters who are bigger in size then me but I'm heavier due to my height and it seems I'm not progressing in muscle. I do take protein straight after sessions. So Instead of me doing weights can I stop that and just do my boxing and running? The thing is I'm worried becasuse as a heavyweight I'm no where near the size of the other heavyweights even tho I'll be heavier then them due to my height.
Running over a long period will develop lean muscle as will boxing. Your making repettious low resistance movements. If you want to gain size you need to have a properly structured weights program specific to you- not the people your doing weights with.
Shadow boxing with dumbells is good, but personally (and i think what jeff means also) i''d suggest a good weight training routine, medium weight, not too heavy or light, and do a lot of squats, bench press and deadlifts, just to pack on a bit of mass without bulking up too much. you will keep it fairly lean with the boxing training and running anyway but you dont want to be too big that its going to restrict your movement right? you need to find out how quickly you put on weight, muscle too not just fat and work it out from there how heavy your going to go, what exercises, how many sets etc. again, i'd throw in a lot of press-ups and pull-ups/chin-ups too tho if your going to lift weights regular. hope this helps.
if your just coming out of a coma or very undertrained you may develop some muscle, otherwise resistance training is needed, and a positive calorie balance
Ok so when I get a specific weight program, weights 3 times a week, boxing 3 times a week and run 5 times a week, fingers crossed should be in the ring soon fit and strong
Don't worry, if you can lift as much as bigger guys then what is the problem, having too much muscle can be a detriment to a boxer. Most of the best boxers in the world have relatively small biceps compared to their rivals. Speed is key. Shane Mosley said his re-emergance as a new boxer was due to ditching his weight training programme he use to do.
Yes you can, bag work is resistance training. It won't build muscle in all places and without limit like weights will, but I've gained a lot of muscle on my back doing nothing but bag work for example. It will stop at an optimum, and you'll only gain muscle where needed.