Who invented that ladder machine?

Jacobs ladder? I have a hard time thinking of a piece of equipment that gets less use in our gym.

Much preferred the old Stairmaster.

I believe his name was Jacob

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I'd like to get past a minute and a half. I'm doing it after cardio or doing quads on the weights though.

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My max has been about ten minutes or so on the thing alternating hands and feet and just feet.

I’ve also tried “sprints” on it. Don’t recommend. Jelly legs is what you get and you wanna do little else but lass out afterwards.