While it isn't healthy, strictly speaking, to cut calories and exercise, especially doing intensive cardio. Doing cardio is almost a liberty to eat what you please, but its definitely true: you are what you eat. Maybe not while you're young, but sooner or later it'll catch up. I take it you are one of those naturally skinny, probably lanky, people? [ectomorphs] If so you are lucky, (in a way) but shouldn't undereat as you haven't got the stores an endomorph like me, for instance, has at his disposal. You should eat at least 2000 calories a day, minimum, with your kind of lifestyle.
