I am still a lot fatter than I'd like to be At 5'2" and 170# (I really should update my profile) but have lost fat and gained LBM since I started doing HIT, so even though my weight is stable I'm leaner than I was. I'd think if you continue to eat at maintenance and avoid overtraining you shouldn't gain fat. I can understand this fear though, since I actually gained fat and lost lean mass a couple of years ago working out too much and eating too many carbs, which were supposedly needed (per my trainer) to fuel workouts.