Why? "This variation looks a lot like a standard plank but involves rocking back and forth," Long explains. "It's great for strengthening your core and also your shoulders." Abbi Henderson is a ...

We all love a plank, right? OK, in truth everybody finds the plank exercise tough—nothing makes time stand still like when you're shaking like a leaf trying to hold your form. Want your next set ...

"Side planks are amazing for obliques and intercostals," Michaels says. These are the muscles between your ribs. This is the same idea as a standard plank, but you're facing the ceiling rather ...

This workout series created by physical therapists will improve your quality of life a quarter hour at a time.

Read on to see how I fared during my 30 days of trying to plank for five minutes. For this challenge, I'd be doing standard forearm planks, which use one's own body weight to strengthen their core ...

Basically, you shouldn't be attempting any single-arm plank variations if you're falling to your knees within 10 seconds when doing a standard plank. If the move is too difficult or advanced for you, ...