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A treadmill is a piece of indoor sporting equipment used to allow for the motions of Running or Walking while staying in one place. The word ''treadmill'' Originally Designated a type of Mill which was operated by a person treading steps of a wheel to grind grain (see Treadwheel .)

The principle is a Belt System (an Electric Motor or Flywheel connected to a circular run of material) where the top of the belt moves to the rear so as to allow a runner to run an equal, and necessarily opposite speed. Thus the speed of the run can easily be set or measured (the rate at which the belt moves is the rate at which the runner moves). The more expensive, heavy-duty versions are motor-driven. The simpler, lighter, cheaper versions are passive, moving only when the walker pushes the belt with their feet, and operates just to resist the motion.


ORIGINS


Treadmills were historically used as a method of reforming offenders in prison, an innovation introduced by . The first private health club in the U.S. was started by Professor Louis Attila in 1894. Cardio workout machines entered the clubs much later and were developed initially for the hospital. The first medical treadmill designed to diagnose heart and lung disease was invented by Dr. Robert Bruce and Wayne Quinton at the University of Washington in 1952. Dr. Kenneth Cooper's research on the benefits of aerobic exercise, published in 1968, provided a medical argument to support the commercial development of the home treadmill and exercise bike.


ADVANTAGES


  • Some treadmills have special features such as step count, heart rate monitors, amount of calories expended.

  • Running or walking on a treadmill can be an effective way to work out compared to other complex cardiovascular exercises (similar to non-treadmill walking/running).

  • Treadmills can be used in the home to avoid going to a gym. Users can do other things while exercising, such as watching television or reading.

  • Users who would not run/walk outdoors (e.g. due to unfavourable weather conditions, uneven road surfaces, dangerous neighbourhoods or people staring) may use an indoor treadmill.

  • Treadmills offer the benefit of reduced impact since all treadmills offer some sort of shock absorption. Exercising on a treadmill can reduce the strain to the ankles, knees and lower back of users.

  • Lack of wind resistance makes running on a treadmill slightly easier than it would otherwise be on an equal elevation grade outdoors.

  • As with all exercise, treadmills can increase Endurance .

  • Known speeds at all times of the run, and being able to change speeds as needed.

  • As most of the factors of the run are known, the energy expended may be calculated.

  • Allows for exact adjustment of Gradient and speed.



DISADVANTAGES

  • Many users find treadmills boring and lose interest after a period.

  • Cost of purchase and electricity to run the treadmill is significantly greater than running outside.

  • Takes up space in homes (disadvantage reduced by "folding treadmill" option).

  • May cause personal injury if not used properly.

  • Can make a loud grinding noise if the belt keeps slipping.

  • Lack of wind resistance makes running on a treadmill easier than it would otherwise be on an equal elevation grade outdoors. Training for outdoor races is complicated due to the subtle differences.

  • Ordinary treadmills, even the expensive models at gyms and clubs, are not usually able to tilt at the steep slopes used on medical treadmills for standardized stress tests.

  • Imposes a strict pace on runners, giving an unnatural feel to running which can cause a runner to lose balance.

  • As with all forms of Cardiovascular Exercise , the risk of Cardiac Arrest is significantly increased. Treadmills may further this risk, as indoor comforts, such as Air Conditioning , may cause a user to feel more comfortable and less likely to stop due to exhaustion.



OTHER USES


As it is basically a Conveyor Belt , the treadmill can be used for activities other than running. If Horse s are being tested (especially in jockey racing) they will be put on a specially constructed treadmill. Recently they were also the center piece of rock band Ok Go 's music video for their song " Here It Goes Again ", which reached the Most Viewed position on YouTube . The video featured the band performing a dance routine on several treadmills.


REPAIRS TO TREADMILLS


Treadmills are considered as the most complex type of fitness equipment to repair by repair professionals . They combine mechanical skills with electrical skills, and sometimes require computer skills in situations where the treadmill is used for stress testing in medical facilities.


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