Build real abdominal and core strength through targeted, repeating movements with a resistance band and stability ball. This drill works your entire core—abs, obliques, and deep stabilizers—without overloading your hip flexors. You’ll do band twists, ball rotations, controlled leg lifts and passes, and leg circles at different heights. These movements strengthen the core control you actually need for safe, powerful jumpbacks, jump-throughs, and arm balances. Five breath holds of navasana in Primary Series isn’t enough—this drill gives you the focused ab work that makes your practice sustainable.