90-90 Flexor Hip-Stretch
Kneel on right knee and bend your left knee at a 90 degree bend in front of you. Tighten your abdominal muscles and bring your hips slightly forward and both arms overhead (Palms facing inward). Hold this position for 15 seconds and repeat.
You should avoid any exercise which causes you to have increasing pain or other symptoms. Consult with a medical professional before beginning any exercise program.