How to Palpate, stretch and release Piriformis Muscle Actively... Active Piriformis Muscle Release (Seated Position) 1. Sit Properly Sit on a firm chair (not a soft sofa). Keep your feet flat on the floor, knees at about 90 degrees. Sit upright but relaxed — neutral spine (not slouched). 2. Cross Your Leg Cross the affected leg (the side you want to release) over the opposite knee. This forms a figure-4 shape (ankle rests over the opposite knee). 3. Apply Gentle Pressure Place one hand on the kn