So I'm about 150lbs and very physically fit. I always lift, run, blah blah blah. However I am looking to put on about 15-20ish lbs over some time. How does one do this without losing speed? Because I know how hard it is to gain weight anyways right now, my metabolism is so high that I haven't gained a pound in a few years, and just adding the fact that I need to continue running will make it even more difficult. I'm looking to play some college rugby and a few pounds won't hurt, just the catch is I can't lose any speed, and if possible I would like to get faster. I'm not slow right now, but with 20 extra pounds I will lose speed. So to sum it all up...gain/maintain speed, gain weight.