Sex efficiency through exercises : special physical culture for women / by Th. H. van de Velde ; [photos, by E. Steinemann].
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The image contains the following text:
MAJOR
PELVIC
ROTATION
(HORIZON-
TAL).
The pelvis has
returned to the
initial position.
The exercise
b?gins anew.
FILM 12.
HH SUSPENSION-
—MM FLEX:0N
The thighs come
to rest over the
edge of the table
and part slowly
as they relax.