Sex efficiency through exercises : special physical culture for women / by Th. H. van de Velde ; [photos, by E. Steinemann].
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LEG ROTA- T I O N IN HANDS-AND- KNEES ATTI- TUDE. On hands and knees. Stretch the left leg from the hip joint slowly b a c It- wards. Keep the knee as straight and terse as possible. FILM 2. PELVIC ROTA- T I O N IN THE HANDS- AND-KNEES ATTITUDE (Beginning of First Phase). The pelvis is ■slowly drawn backwards from the lum- bar vertebra?. The hands are not moved. FILM 3. VERTICAL PELVIC ROTA- T I O N ON HANDS AND KNEES. " The M a c h i n e " Exercise. The preliminary movement here ■consists in draw- ing back the pelvis to the heels while the hands remain stationary on the ground.