Hip flexor stretch hugging knee to chest (Iliopsoas stretch, opposite leg flexed, supine; 01)

Lie on the bed with your legs hanging off the of the end of the bed.
Bring your unaffected leg in towards your chest.
Hug your unaffected knee into your chest.
Your other leg should remain dangling off the edge of the bed.
You should feel a stretch in the front of your hip.
Hold this position before relaxing your leg back down.