Exercise machine - but I am not sure what they are exercising

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Exercise machine - but I am not sure what they are exercising
Get your motor runnin' Head out on the UH highway Looking for UH UH adventure In whatever OH GOD comes UH our UH way That's it I'm outta . . . here . . . whose stupid idea was this anyway?
Vogue February 1, 1947
F.B. O'Connor Improvement in Exercising Machines, 9/5/1871
Series: Utility Patent Drawings, 1837 - 1911
Record Group 241: Records of the Patent and Trademark Office, 1836 - 1978
Image description: Drawing of a patent for a Lifting-Machine, by Francis B. O’Connor. A mustachioed man in a shirt, vest, and rather tight trousers stands on a platform. In each hand he holds onto a handle which is connected to a large looped rubber band. The other end of each rubber band is connected to the platform.
Image description: Zoomed in on the drawing of the man.
‘Body by Soloflex’
Soloflex exercise machine advertisement (1984).
Exercising~
I need some muscles to carry my Thicc figure~
anything can be used as a bed if the desire to nap is strong enough.