Thing is, I am usually aggressive in my style, with people, on mitts, on bag, but when It comes to sparring with coach..I just don't give it my all, too much respect? I don't know, I am 100% sure he wont feel a thing but I still pull back punches and just stand there. He is 202cm *no joke * about 105 kg i think, and he was a national champ for 4 years i think, he isn't too old too, about 29 years old. So, i dont know, is it an age thing? or just afraid of punching a tank? I don't know, so guys, what do you suggest? What do you do with your coaches?