00:00A treadmill is a device that allows people to exercise at home.
00:02When it was first invented, it was actually a torture device to punish criminals.
00:06It's okay if you don't understand it. It's no use if you understand it.
00:07Just do it if you understand it.
00:08In the early 19th century, with the industrial revolution,
00:11the crime rate in the UK was extremely high.
00:13Prisons were almost blown up.
00:15Due to poor prison management,
00:16prisoners would only make trouble every day.
00:18British engineer William Coopert
00:19invented the prison version of the treadmill.
00:22The main body of the treadmill is a super big roller.
00:24There are dozens of pedals on it.
00:25Prisoners need to step on the pedals to generate power
00:28to grind bones and draw water.
00:29Prisoners need to step on the pedals for at least six hours a day
00:32so that they don't have the energy to fight and make trouble.
00:34At the same time, they can also generate income.
00:36In 1818, the British prison began to introduce this treadmill.
00:39Later, more than 50 prisons followed suit.
00:41However, over the course of more than 70 years,
00:43due to the overwork of countless prisoners,
00:45this kind of physical punishment began to cause social dissatisfaction.
00:47In 1889, the British prison law announced the prohibition of this kind of punishment.
00:50But decades later, the treadmill became a fitness equipment for Americans.
00:54It's another story.
