Some people will argue that since the body is using some of its 'energy' (whatever that means) to make the muscles grow, obviously it has to make up for this by not growing as much in height. Muscles aren't going to grow unless you increase your caloric intake or unless you're already eating enough calories (in which case you'll stop growing horizontally, or at least at a lesser pace). The muscles don't take precedence over the normal functions of living, including growing. If you don't have enough calories, your muscles simply won't grow. It's not going to stunt your height or make your lungs stop working or your brain stop functioning if you don't have enough calories.