I have been weight training a lot this year, since it is my last year of high school and I am taking weight training second period. The coach is a football coach, and all he seems to care about is getting big (3 sets of ten! grunt! me strong!) However, I gain muscle really easily. I think that in the past few months since the end of out "classroom" instruction, I have gained about 10 pounds of muscle, and lost about 5 pounds of fat. I look noticably bigger, and I weigh about 180, and this is while doing 4 sets of 12. 180 is okay, but but it is kinda big for an endurance (real) athlete. I was thinking that I might scale back the weights a bit and pump up the reps to 3x20, so that I can maintain the mass I have but not get any bigger.
the main question is, is this too many reps? will this do any good?