Pentonville Prison
During the Victorian Era, British engineer Sir William Cubitt designed the “treadmill” to implement into prisons. The device was constructed of wooden steps around a cylindrical frame; the punishment could handle up to forty convicts at one time. The treadmill would rotate causing the convicts to step along a series of planks. Occasionally the power from these devices would be used to grind corn or pump water; however, sometimes the treadmill was strictly used for no purpose other than punishment.