Neutral Knee Pits While Walking
Try a slow motion walk while keeping the neutral knee-pit. Try it step by step:
Neutral stance
Externally rotate your thighs
Hip list to stand on one leg
Step forward
BUT before putting your weight down onto the next leg: externally rotate that thigh again.
Engage the front leg to pull your body forward while hip listing onto that leg. Keeping the external rotation.
Repeat the process again taking another step forward.
Walking in slow motion is a great way to watch the tendency of the hips to collapse into internal rotation, and then to train your external hip rotators to remain engaged and keep your hips stable.