With 7.6 million views on YouTube and the claim it’s the hardest abs workout ever in the title, I had to give this 9-minute workout a go, and it was a stern challenge for my core.

That's why you need the best ab workouts - and a strong core as a whole ... alternating between left and right. A) Lift the ball straight up overhead (not behind you). Keep your back straight ...

This article was medically reviewed by Audrey Bowman, RRCA certified running coach, BS in Exercise Science, and fitness instructor at Relentless Runners in Knoxville, TN. Do this ab workout two to ...

Extend the legs out... Narrator Efficient Ab workouts utilize a variety of simple floor and standing routines and can incorporate an exercise ball. The bicycle maneuver is thought to be one of the ...

Working your abdominal ... exercises offer similar, and sometimes better, results. For example, a 2010 study found that exercises done in a prone — face-down — position on an exercise ball ...