• Lie on back on ground with heels on center of physioball
• Raise body into straight line so only shoulder blades touch floor
• Keeping both legs straight, raise left leg
• Lower back to start position; raise right leg

Coaching points: Keep body straight and in bridge position throughout // Hold raised leg for 2 to 3 seconds
Goodstein: It’s a core stability exercise [that also] works on extension of the hip [and] strengthening the lower back.