RT Journal Article SR Electronic T1 Isometric Exercise Apparatus JF Physical Therapy JO Phys Ther FD American Physical Therapy Association SP 1289 OP 1290 VO 61 IS 9 A1 Ganz, Sandy B A1 Young, Jill YR 1981 UL http://jcore-reference.highwire.org/content/61/9/1289.abstract AB