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.

What we see is sheer determination and a whole lot of strength. Look at that baby hand in the air, lifting, stretching! She's also quite graceful even when she wobbles, falls, and tries again. A most ...