Sex efficiency through exercises : special physical culture for women / by Th. H. van de Velde ; [photos, by E. Steinemann].

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MAJOR PELVIC ROTATION (HORIZON- TAL) {Sixth Phase). The pelvis is as far as possible to the left. FILM 11. PELVIC VER- SION WHILE WALKING (Seventh Phase). The feet are drawn upwards, resting the weight on the ball of the soles. The pelvis begins to turn from left to right.