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: RECUMBENT, WITH RAISED KNEES (Sixth Phase). The pelvis has reached the 1 ighest point of its orbit, as in the first phase. The exercise continues in the following man- ner : in the next sequence of pictures : rotat- ing to the right, as shown in phases 2 to 6. FILM 5. SQUATTING OR CROUCH- ING SWING {Eighth Phase). The pelvis again touches the floor and the exercise begins anew.