The Lateral Tubing Walk is definitely one of my favorite exercises to use in the initial stages of my corrective programs. The one thing that I notice is how its typically instructed, which is with the knees bent, or allowing the person to bend forward at the hips. This never made sense to me, especially considering the hip abduction movement pattern is tested generally while laying down (You can find this in my 7 Movement Tests Video Course). The hip would be in a neutral position, and preferably in slight extension.
If the intention is to assist in correcting excess anterior pelvic tilt, the hips should be placed in extension during the exercise, and the range of motion limited to avoid hip-hiking.