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Treadmills range in price from $900 to $3,000. Precor is part of the Finland-based Amer Sports Corporation. Its treadmills can be purchased nationwide at specialty fitness stores. Prices range from $2,500 to $7,000.

More recently, treadmills are not used to harness power, but as exercise machines for running or walking in one place. Rather than the user powering the mill, the machine provides a moving platform with a wide conveyor belt driven by an electric motor or a flywheel.

Exercising on a treadmill often feels like torture, and that's not exactly a coincidence. In 1818, an English civil engineer named Sir William Cubitt devised a machine called the ﾓtread-wheelﾔ to reform stubborn and idle convicts. (Hence the eventual name treadmill.)

Treadmills were invented in 1818 by an English engineer named Sir William Cubitt, son of a miller. Noting idle prisoners at Bury St Edmundsgaol, he proposed using their muscle power to both cure their idleness and produce useful work.

The tendency of a person to remain at a relatively stable level of happiness despite a change in fortune or the achievement of major goals. According to the hedonic treadmill, as a person makes more money, expectations and desires rise in tandem, which results in no permanent gain in happiness.

Treadmills give a great cardiovascular workout and help improve heart health. Each time you step on a treadmill, you strengthen your heart. And as your heart grows stronger, you lower your blood pressure. Plus, the act of running or walking helps to get the blood flowing, which reduces the stress on your heart.