There are many ways to do a plank, from straight-arm, side, and one-legged planks to plank knee taps and jacks. These moves ...

Strengthen your abs and obliques with this 12-minute core circuit that you can do anywhere without any equipment bar a yoga mat.

Although Erika Rischko set a new nine-minute plank record at the end of August, it wasn't a feat she'd set herself the goal of accomplishing. As it turns out, the 85-year-old fitness influencer from ...