How many sit-ups one does overall is dependent on the individual level of fitness. Definitely do not do more than 30 repetitions without having a rest. People who try to do 50 or more repetitions ...

However, to reap the benefits of the exercise, you have to learn how to do sit-ups properly. Well, that’s no longer a problem because we’ve laid out everything you need to know. Keep reading ...

To ramp up the challenge, some of these moves incorporate a dumbbell, which not only increases difficulty but also helps ...