Originally Posted by Joshua Ryan Smith
More muscle = more weight = more strength. Therefore if you are gaining the "right kind" of weight, then your performance at bodyweight exercises should remain pretty constant.
there's a difference between gaining muscle mass, and making the muscle you already have denser, more visible, and able to do more work. to actually gain muscle mass you need to eat A LOT of calories over your maintenance diet, about double. unfortunately you will add quite a bit of fat too and i think that's where the body-weight stuff suffers while adding mass.