Benefits: Challenge your entire body with this next-level stability ball exercise. It works your core as you pass the ball between your hands and feet, and you have to engage your inner thighs and arms to keep the ball from falling to the ground.

• Lie with your back flat on the floor with your legs extended straight on the floor, holding a stability ball overhead with both hands. Brace your core to minimize any arch in your lower back. This is your starting position.
• Squeeze your abs to lift your arms and legs to place the ball between your calves, creating a “V” position.
• Lower back down to the starting position, but this time with the ball between your legs.
• Repeat the movement, passing the ball back and forth between your hands and legs.