"From a side plank, lift your top leg and arm into a starfish position. Hold or pulse," Willis suggests. "In a forearm plank, slide a mini band across the floor underneath you, from hand to hand. Keep ...

RELATED: 7 Easy Wall Pilates Exercises That'll Tone Your Core in No Time. The hundred is a foundational mat Pilates move, and many people use it to open their routine. Andrea Lepcio, founder and owner ...