IMPROVED ABDOMINAL EXERCISER WITH ROTATABLE SEAT AND TANDEM PULLEY FEATURE

摘要

PROBLEM TO BE SOLVED: To provide further improvements in abdominal exercise devices which enhance the exercising of the stomach and back muscles while avoiding adverse pressure on the back and neck muscles.;SOLUTION: A low friction journal between a base frame 12 and a seat frame 16 supports a user's weight. The low friction journal is located about 30 to 42% the distance from a rear end of a cushion to its front end so the user's coccyx is vertically aligned with the journal. Arms 50 at each side of the base frame 12 have a pair of extensions connected to either the base frame 12 or the seat frame 16, each extension with a U-shaped handhold lying in a plane at an acute angle of about 30 to 80 degrees to the horizontal. A pair of single pulleys 60 or a pair of tandem pulleys 60 are mounted near the rear of the base frame 12 and are engaged by resilient sleeve-covered springs for biasing the back frame toward the upright position.;COPYRIGHT: (C)2013,JPO&INPIT