Dumbbell-shaped training device consists of piece and two threads at ends and curved cavity over longitudinal axis in interior, where radius of cavity is constructed according to human anatomical axes of motion of shoulder-elbow-hip and
摘要
<p>The dumbbell-shaped training device (1) consists of a piece and two threads (2) at the ends and a curved cavity (3) over the longitudinal axis in the interior. The radius of the cavity is constructed according to the human anatomical axes of motion of the shoulder-elbow-hip and knee. The outer cross section (4) of the human hand is adjusted by gripping ergonomically and the openings (5) are provided for mounting the supporting loops in the training device.</p>
