I know what you mean. I think I worded it wrong. what i meant was that i have heard a lot of trainers and coaches saying you got to be as light as you can be. a lot of our fighters are under 77kg and being over is almost frowned upon. i just wondered why?
I'd imagine its probably their view of your fighting frame. For example, you dont wanna be a short but massively muscled heavyweight because youre then leaving yourself really short on reach, and the amount of muscle mass youre carrying will damage your cardio immensely. Its about maximising your advantages, and i guess they see it as the lighter you can fight, the better. If youre not comfortable with the weight theyre asking you to fight at, maybe try and train and fight out of another gym, or at least get a second opinion from an outside coaching staff.
You gotta understand though that if youre walking around at 75kg, and you wanna fight at that weight too, youre gonna be fighting guys who are significantly larger than you because they'll be cutting to reach that limit, whereas you wont be.
If its a case of that you want to bulk so you can cut to fight at 75kg, but they wont allow you to do that, then maybe youre at the wrong gym?
But again, be wary in that you dont want to have too much muscle on your frame as it will have a negative impact on your game. Not only on your cardio, but you'll notice that your strikes dont flow as fluent and your movements become more laboured.