This 10-minute abs workout from fitness trainer Chris Heria is found on YouTube channel THENX. It’s a fast-paced session that works all the muscles in your core, and it’s suitable for all fitness ...

Denise Austin shared a workout video targeting the abs on Instagram. The fitness pro demonstrated three “easy” standing moves. You can do these moves “anywhere” and “at any time,” Austin explained.

The Bottom Line: Ditch the sit-ups. These bodyweight exercises are smarter, tougher, and deliver more bang for your buck.