1- Are there different types of calories? I know that a calorie isn't an actual "thing", but a unit of heat, but is there a difference between calories from a chicken breast and from a candy bar or soda? I don't know alot about nutrition.. 2- Is it difficult to bulk (i'm skinny and tall) in a healthy way? I need to consume ALOT of calories (well, alot for me) to bulk up, and it seems like the only realistic way is by eating some junk food.. i'd like to remain eating somewhat healthy, but if i have to eat some dirty food, i can. I just don't want to destroy my health doing it.. 3- Should I do any aerobic exersize (jogging, etc) while bulking, or should i not do that and just lift? 4- What are some ways to work my legs out without a gym membership? im about to go part time at work and go to school, so im not going to have to money available that i used to for a gym membership.. I've been lifting and working out on and off for a while, and ive seen some, but minimal results.. I just decided to get serious about it, so now i'm trying to make a good effort to get some more muscle mass on my body..