Sex efficiency through exercises : special physical culture for women / by Th. H. van de Velde ; [photos, by E. Steinemann].
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- (canvas 360)
The image contains the following text:
MAJOR
PELVIC
ROTATION
(HORIZON-
TAL) (Fourth
Phase).
The pelvis is as
far forward f as
possible.
FILM^12.
SUSPENSION-
FLEXION
(Ninth Phase).
The legs,
stretched to full
length, are
slowly lowered.