The dark history of the treadmill
The exercise machine that is torturous by design
If you've ever looked at a treadmill and thought, "That looks like torture," you may be interested to know that this is exactly how it was intended. While the modern treadmill is intended to serve the benign purpose of improving cardiovascular fitness, the treadmills of old were used as a torture method in prisons across the globe.
Check out this gallery to find out how the treadmill went from prison torture device to popular gym machine.
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