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 (H ORIZON- TAL) [Eighth Phase). The pelvis has returned to the initia position. The exercise begins anew. FILM 11. PELVIC VER- SION WHILE WALKING (Eighth Phase). The thighs and knees are thrust more forward and the pelvis moves more to the right.