i know what your talking about with fast food forming bad habits. im a 5'11" 15 year old athlete (hence the name) that weighs 128lbs, really fast metabolism. so if i dont want to collapse during a race, i have to spend most of my waking time eating something, and that gets pretty annoying. then i started to eat fast foods so i wouldnt always have to be eating. remember, im 15 and average about 3 hours of
[hr]
exercise a day. the fast food was making me race worse, despite my exercise. even if you exercise, it will still worsen you blood chemistry. btw, im now still eating around 4.5k calories a day, but i know that it wont form any bad habits when my metabolism (hopefully) slows down. point is, the fast food will mess with you and it will get addictive. you can still have it on occasion, just not regularly.