Exercise devices – User manipulated force resisting apparatus – component... – Having common force transmitting support frame for user and...
Patent
1990-09-28
1992-05-05
Bahr, Robert
Exercise devices
User manipulated force resisting apparatus, component...
Having common force transmitting support frame for user and...
128 25R, 297338, 297345, 482130, 482142, A63B 2100
Patent
active
051101211
ABSTRACT:
An exercise chair is specifically designed to be usable as an ordinary office chair or as a device for exercising the muscles of the lower back. The chair employs both anterior and posterior pelvic restraints to prevent rotation of the pelvic region during an exercise routine. The chair includes a variable resistance mechanism for selectively varying the forces that must be overcome during an exercise movement which consists of forcing the back of the chair rearwardly from a desired initially forward position.
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Physical Therapy, vol. 67, No. 4, Apr. 1987, pp. 534-539, entitled Comparison of the Effectiveness of Two Pelvic Stabilization Systems on Pelvic Movement During Maximal Isometric Trunk Extension and Flexion Muscle Contractions by Cheryl M. Petersen, Louis R. Amundsen, and Michael J. Schendel.
Bahr Robert
Doyle J.
Yeager Arthur G.
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