File:"Zander Type C-34 Adjustable Weight Back Stretch Unit" is a narrow velvet-upholstered platform supported with an oak frame (c6a8f73b-4223-4e73-907d-17b3a34dd6ae).jpg

English: "Zander Type C-3/4 Adjustable Weight Back Stretch Unit" is a narrow velvet-upholstered platform supported with an oak frame, with an iron pulley mechanism attached to the end, a slot with an adjustable foot board near the end, and an inclining adjustable back. A flywheel is attached to one side, leather straps lie across the middle to secure the user's legs, and a bow-shaped iron adjustment support is attached under the moving back rest. This machine could be used in several ways; by bracing his feet against the footrest and securing his legs with the leather straps, a user could do sit-ups, adjusting the back to suit his strength. He could also use the flywheel to push the footboard against his feet, resisting the pressure with his outstretched legs. Finally, for more strenuous training he could put on a harness attached by a metal cord to a weight. The metal cord would pass over the pulley, and the user would do sit-ups using the added resistance of the weight.