【Haichuan Teahouse】Do you know what treadmills were originally used for?
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The predecessor of the treadmill was actually a device used in prisons to punish prisoners... Its original form resembled a water wheel, with a partition in the middle to prevent prisoners from whispering to each other; one had to keep stepping on it for seven or eight hours…
I thought it was a machine set up for them on their escape route; P
There used to be a mouse cage generator