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) (Fourth Phase). The pelvis is as far as possible forwards. FILM 12. SUSPENSION- FLEXION [Fourth Phase). The woman has now raised her legs high enough to enable her to let go of the table edges with- out risk of slip- ping off.