It all depends on how many you are doing, also keep in mind that sit-ups aren't as effective as crunches, crunches will get you abs much quicker... also, you must be exercising fairly frequently (read everyday), not just doing sit-ups, if you want abs.
Sit ups
Sit ups helps your abs become more tough or strong.
By doing sit ups.
Every one has 'abs' to start out with. Though, to get tight abs you need to do sit ups and other exercises. You cannot get tight abs without doing sit ups or any other form of exercise.
ur abs
Sit Ups
2000 sit ups a day]
sit ups
yes
yes thet can
534832it completely depends on your stamina ......different people have different stamina.....and only doing sit ups will not lead to abs there are various other excerices for making abs ..so get proper guidance from a trainer....
Crunches, squat thrusts, push ups, and pull-ups are good abodomen exsersise. Its true this made me get my abs Do at least 500 sit ups a day, and you can stop for 1 minuite break every 100 sit ups. Trust me this is the best 6ab exercise after One Month you will have 6 abs