The runner's plank is an alternative I use as a certified trainer when sit-ups aren't possible, and this is exactly how to do ...

Both sit-ups and crunches can help target your core muscles, but there are key differences between the two ab workouts.

This standing abs routine strengthens your core, boosts posture, and lays the foundation for a stronger, more balanced body.

Sit-ups (where the upper body is lifted completely) and crunches (where only the shoulder blades lift off the ground) are classic abdominal exercises. Photo: Getty Images Sit-ups and crunches are two ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images Bored of planks and crunches? Why not try mixing things up with a killer ab ...

The best bodyweight exercises targeting the core include functional, full-core training exercises like the dead bug, bird dog ...

There are two kinds of people in this world: People who want to work their core and people who consider core exercises their worst nightmare. But regardless of which camp you fall into, if you are ...

It’s kind of strange, if you think about it, that the sit-up should be a thing in the first place. In what world would we have to lie down and sit up repeatedly, until our bellies are sore? What are ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images We’ve said it before and we’ll say it again — when it comes to building a ...

Ditch sit-ups. These 6 standing core moves firm your abs, boost balance, and help trim belly overhang after 45.

Workouts No, not kegels — this deep core routine will strengthen your abs and pelvic floor Workouts Goodbye crunches and sit-ups — these 3 exercises target your 'deep core' muscles to strengthen your ...