The side plank is a great move for working these crucial ... I told myself I’d be amazed I could reach three sets of 15 by the end of the week, which was hardly the right attitude, but I ...

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.

This is the workout: 10 partial single-arm sit-ups 15 leg lifts Side plank (on forearm) with dumbbell reach 15 reverse crunches 30-second forearm plank with dumbbell pull-through If these ...