As in metal, everybody trains with weight its called Gravity. Use to use them before I understood Feel. Now I dont, found better ways 2 kg is the most I use, using metal.
I think it's okay to use weights as long as you do all the other exercises too. you obviously need to be flexible too.
When you say bodyweight training do you use exercises such as one handed press-ups and one handed chin-ups? If not then you aren't going to get any stronger.
I think weights are a must. A fighter must be balanced. If all you do is boxing training, running and calisthenics then you wont be a strong fighter. If you only do boxing training and weights you will be a fighter who gasses out quickly. I believe you have to mix everything; weights (heavy and light), calisthenics, running, other fitness such as cycling, core training, and most improtantly skill training and sparring.
Boxing lad i used to be strong in the weight room but i dropped it because i just dont feel it transfers all that well to boxing, you can be big and strong in the weight room but it doesnt mean your going to be strong wrestling on the inside, or throwing your shots, the more i learn the more im understanding technique seems to be the best path to stay on, i think using weights to build strength for a boxing match is a hard thing to do and not as simple as doing some benching, some deadlifts and squats, i think its harder than a lot of people think to actually stimulate the muscles in a way which is going to improve strength that transfers through to boxing and any strength gains that will occur will come along with the extra bulk and weight that comes with weight training which is like 40% non contractile tissues (the bodys support systems that help feed the muscles to sustain further reps but arent actual contractile muscle tissue)so isnt really functional to boxing at all. its even harder to scientifically prove that indeed it is this supplementary training thats made the improvement in strength in the ring as in most cases while this supplementary training is being utilized so is technique training so its hard to pin point if the increase in power is the result of better techique or raw brute strength, i believe i know a man who is on the right track, many say his methods are unconventional but i think this is the way we need to be looking at training because it just doesnt add up to me, who has ever bench pressed or squatted their way to a win in a boxing match?
What made me start weight trianing was buying one of Ross Enamait's books: 'Infinite Intensity'. It showed some of the things he does and I also watched some youtube videos of him, one of him hitting the bag where his speed is incredible. Only now do I consistently train with weights.
Why are you making the assumtion that I am a guy training for extra bulk or to show off an impressive bench press? I train for boxing, there are many weights movements I do aswell as bodyweight movements which increase strength and endurance for boxing. Don't assume that everyone doing weights is a bodybuilder.
must use weights has to be done correctly. our gym has a conditioning coach that comes in, we do specific fighter conditioning, since i started this i have never looked back, i am stronger and fitter but i havnt put on any weight, if anything i have leaned up more. train weights for strenght and endurance, not size
weights will not make you slower, it will actually make you quicker and more explosive if trained properly