Undertaking
Patent
1986-07-10
1988-06-21
Apley, Richard J.
Undertaking
272144, A63B 2302
Patent
active
047520671
ABSTRACT:
Apparatus for use in exercising the abdominal muscles, which improves the physiological effectiveness of the familiar sit-up exercise, is disclosed. The apparatus is comprised of a specially shaped basin which cradles the pelvis while at the same time the lumber spine is supported by a longitudinal support portion. The angulation between the pelvic basin and the lumber support portion is arched convexly superiorly to accommodate the anatomical transition between the sacrum and the lumber spine. A rocker portion thereby properly activates the several abdominal muscle groups during use. The rocker portion also cradles the user's tailbone suspending the boney structure and thereby reducing frictional and compressional forces thereon. Two handles to suit several arm lengths are on opposing sides of the pelvic basin, and are designed to assist proper posturing of the user on the device and to allow for use of upper extremity strength in assisting the user to perform the exercise. Two inferior projections on opposing sides of the pelvic basin act as lateral stabilizers, and so as to prevent injury to the user's hands while grasping the handles.
REFERENCES:
patent: D152394 (1949-01-01), Ceverha
patent: 1904039 (1933-04-01), Bruder
patent: 4132228 (1979-01-01), Green
patent: 4230099 (1980-10-01), Richardson
Apley Richard J.
Crow S. R.
Hewson Donald E.
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