These images come from a catalogue distributed by “Görransson’s mekaniska verkstad”, a gymnastics equipment company, and are reproduced in a book published by Dr. Alfred Levertin on Dr. G. Zander’s Medico-Mechanische Gymnastik (1892). Aside from the shock of seeing the gymgoers’ choice of athletic wear (thick three-piece suits with pocket watches affixed on chains), there is something uncanny about the marked lack of exertion displayed on Zander’s patients’ faces.  Zander’s technology was marketed as a passive activity — with some devices even driven by steam, gasoline, or electricity. All one had to do was connect their body to the machine and it would do the work for them. . . or so they were told.
From Public Domain Review: publicdomainreview.org/collection/zander-gym.

For more on Zander, see the article by Carolyn de la Pena at www.cabinetmagazine.org/issues/29/pena.php