How many sets and reps of sit-ups do I have to do each day to get a six pack?
Best plan is develop a workout plan using high intensity training, it gives you great muscles everywhere, not just your abdomin.
easier to just gone down to the store and buy one
start off slow do as much as u can then as u continue to progress do more maybe like 5 sets of 10 each day
it depends on your body type and the shape and condition your in now so I can't really say