• Stand on Bosu with feet shoulder-width apart and arms extended fully forward
• Squat until legs are bent 90 degrees
• Return to start position; repeat

Coaching points: Balance on hard side of Bosu // Perform exercise in slow, controlled manner // Keep core tight throughout
Goodstein: Adding unstable surfaces will help you stabilize when your feet are on the ground around the ball, and opponents are pushing and tugging at you.