Here’s how it works. Luckily, there are many variations of the plank that involve actual movement, and one of them is the side plank with hip dip, so my editor decided it was time I gave it a go.

Unlike standard planks, this entails moving from a straight-arm position to forearms and back again for however many reps you program, while keeping one leg raised into the air. I like to perform ...

The Routine Lie flat on your back with your hands behind your head and legs raised. Twist your torso ... for the prescribed reps. Start in a side plank position with your right elbow directly ...