I've been regularly going to the gym around 3 - 5 times a week. I do not do crazy workout like some other people. I only do resistance training enough to may be build some muscle in a few months. I just joined Kung Fu class and the instructor told me that it was a bad idea to do both Kung Fu and go to the Gym as it will make by body be disproportionate and cause back pain. Is that true? If it is under what circumstances? i.e. how much work is too much?
As for myself, I am 32 years old and 6'3" weight around 200 pounds. I am already a bit muscular, i.e. I am able to incline press 200 pounds for 16 reps.
Edit 1: I plan on doing 1 - 2 Kung Fu sessions a week. Each sessions is about an hour.