While this happens, sit-ups also build the rectus abdominis, the muscle responsible for the six-pack, which studies show is ...

How Many Sit-Ups You Should Do in a Day Here, MH breaks down the benefits of sit-ups, the muscles worked, how to do them, how many reps and sets you should be aiming for, the best sit-up ...

When most people think of a strong core or achieving abs, the first exercise that comes to mind is often sit-ups. While sit-ups have long been a go-to for strengthening the core, they're not ...