Boy, have we got a fun-filled planking challenge for YOU! We're not talking about the kind of planking where you just lie on your belly...this effective workout requires effort with two great sets of plank holds & dynamic core moves! If you want to get technical, this workout focuses on your Transverse Abdominis (TrA). It's the body's innermost ab muscle, which helps create a flat stomach and prevents lower back pain. Can you take the plankster heat?! Warm up and get planking! PS: if you want to make this workout intense, do full side planks.