ok im 21 yrs old, and i weigh 165-170 at 5'7'' and i want to get back in shape. i heard the best way is to bulk up then cut down but i have no idea what kind of diet to be on for that or a workout routine. ive always been active in wrestling and boxing but they dont have a routine it was just practice, and scince then ive gotten lazy and need help on what to do??