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vorab: danke für die mühe.

was herr consterdine da zeigt sieht in meinen augen aus wie eine (bzw zwei) rotation(en) um die wirbelsäule.
die linke hüfte geht vor, um die recht hüfte nach hinten zu bringen und damit distanz und damit eine möglichkeit zur erweiterten kraftentwicklung der rechten schlaghand zu generieren.

aber eine änderung der drehachse kann ich nicht erkennen. die zentrale drehachse bleibt die wirbelsäule.
In seinen Worten:

SB) You're famous for using a 'double hip action' when striking - could you explain this process and philosophy to us and why do you think that a double hip movement is more effective than the traditional 'fixed hinge' single hip movement?

(PC) The ‘Double Hip’ was Kimura’s dynamic or impact development. It arose by him comparing Karate punches with other sports that require a similar dynamic effect with an arm and hand – golf, tennis, javelin, shot putt, or simply throwing a ball. None of these other sports work the hips, shoulder and arm in any similar way to how we punch. They all have a backwards/forwards action of the hip, a delayed shoulder and a further delayed arm coming forward after that. This gives a real dynamic effect to the blow as the arm now simply conveys the body weight to the target. What is also different is between the pivot points.

The effect of delivering bodyweight when striking with the 'double hip.'

Using the analogy of two types of door, trad Karate uses a revolving door with a central pivot around which both hips rotate. The problem here is that the same weight goes out of the rear as it does to the front. Shukokai uses the lead hip as the pivot point just like e single door with three hinges – knee, hip, and shoulder locked in the door frame and not allowed to move backwards meaning all the body weight goes into the strike. Another key point is that the rear leg is not locked down on the floor but allowed to move up to facilitate the transition of the hips forward. All the body weight is rotated into the punch and the double hip is analogous with a tennis serve than it is with a trad punch. It works for blocks, kicks and sweeps.
https://www.britishcombat.co.uk/view...er-Consterdine