CostaSpine Demonstrates Piriformis Stretch by Ricardo Marques | Aug 10, 2017 | StretchesHere is David performing the ‘figure 4’ stretch to isolate the piriformis muscle. To enhance this stretch use a table and put your leg on table and lean over the leg, applying the same principle.If when you lie down and notice the one foot is slightly externally rotated 9/10 times you have a tight piriformis on the side that is more externally rotated.Remember hold each stretch for 15 seconds and do 3 sets of each stretch.Yours in HealthcareCostaSpine