The pelvis rotates when we walk, that’s the ideal. One side swings forward with an advancing step, makes the step longer and more fluent, while the other is back only in relation to the advancing side. It does not MOVE back. Runners are taught this skill to lengthen their stride. It’s a very natural thing. Come take a walk with me on Broadway and I’ll show you some splendid examples, not usually, among the apparently straight gentlemen. Wow. Do you have to walk straight to be straight? Seriously, I wonder what it costs most guys, NOT to let their pelvis rotate. Come on guys. Get with it. The swivel ain’t drivel