Hip rotation is one of the main actions of our hip (along with flexion, extension, adduction and abduction), so a healthy flexibility training routine should contain some exercises to help with your rotation. Flexy and strong hip rotators not only help in poses that require a lot of rotation (like the amount of external rotation required for pigeon pose, or sitting cross-legged on the floor), but they also help stabilize our hips in positions of flexion or extension (like our front splits!).