exercise ball hip flexor stretch

Place the stability ball on the ground and kneel in front of it. Place your right foot on top of the stability ball, with your knee bent at a 90-degree angle. Extend your left leg behind you, keeping it straight. Lean forward, pushing your hips towards the stability ball, until you feel a stretch in your right hip flexor. Hold the stretch for 20-30 seconds, then switch sides and repeat.