The classic sit-up is a workout staple. Whether you've become all too familiar with the movement in your weekend HIIT class or eked out those last few reps while following a home workout video, you've ...

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 always ...

THE CLASSIC SITUP is a workout staple. Whether you learned how to do the movement in gym class or from watching a Rocky training montage, you've probably performed more than a few sets over the years ...

The classic sit-up is a workout staple. Whether you learned how to do the movement in gym class or from watching a Rocky training montage, you've probably performed more than a few sets over the years ...

Alison Brie and Jessica Biel are showing off the L-sit chin-up. Here's how to do one with good form, and how much strength it requires. When Bruno first shared a video of Timberlake knocking out 10 ...