Fitness experts say this dynamic twist on a classic exercise could be the missing link for stronger abs and defined obliques.

This variation on the classic crunch adds more focus to the obliques through a twisting motion and challenges you to 'smash' your elbow into your knees.

Sit-ups can be a great way to strengthen your abdominal muscles that sit around your stomach. But they can quickly get repetitive and its easy to accidentally lose your form, so when boredom strikes, ...

Tyler Ryan and Jonelle Green chat about an essential core routine ...