Training apparatus for strengthening the back muscles has a blade structure at the back with longitudinal extension to compensate for lengthening of the back during exercises and match the physique and spine curvature of the user

摘要

The apparatus for physical training, to increase the strength of the back muscles, has a system of blades against the back, which can be extended along the back to compensate for lengthening of the back during exercises. The blades are bonded together with rotation, with a resistance against each other, and apply different training effects to separate zones of the back.