How do you spell treadmill, anyways?

In today’s society, fitness is becoming increasingly important, and one of the devices that people are using for exercise is the treadmill. However, the question arises, “How do you spell treadmill, anyway?” This article will provide an in-depth analysis of the spelling of treadmill, the origin of the word, and why it matters.

The Correct Spelling of Treadmill

There is only one correct spelling of the word treadmill, and it is spelled as “t-r-e-a-d-m-i-l-l.” This spelling has been in existence since the 1660s, when treadmills were first invented. The word comes from two Old English words: “tredan” which means to tread, stomp, or tramp, and “mǣl” which means time or turn. The combination of these two words explains a device that one uses to turn the steps with their feet repeatedly. This device is commonly used for exercise or as a punishment, such as in prisons or labor camps.

The History of the Treadmill

The treadmill was first invented in the 1800s by a British engineer named Sir William Cubitt. The device was originally used as a form of punishment for prisoners and was designed to be a more efficient way of grinding grain compared to traditional manual labor. The machine was equipped with a large cylinder with steps on the exterior, all of which revolved around the cylinder’s axis. Prisoners would use the steps to power the grain grinder, which would grind corn or wheat into flour.

In the 1960s, the treadmill was redesigned to be a device for exercise by Dr. Kenneth Cooper. This was instrumental in the development of cardio workout culture. It gained popularity and was eventually available in most gyms around the world.

The Different Types of Treadmills

There are three main types of treadmills: manual, electric, and curved.

Manual Treadmill

Manual treadmills are purely mechanical, so the user has to move the belt themselves by pushing it with their feet. Instead of an electric motor, manual treadmills depend on the wearer’s movement, and the more you walk or run, the faster the treadmill moves.

Electric Treadmill

The electric treadmill is the most common and comfortable treadmill to use. An electric motor powers this machine. You can change the speed and incline to simulate a variety of hill workouts or flat running. Electric treadmills are also equipped with features such as fans, heart rate monitors, and pre-programmed workouts.

Curved Treadmill

Curved treadmills are a modern form of treadmill technology, both manual and electric. What makes a curved treadmill different from other designs is its unique curved belt. The belt’s curve allows the runner to utilize additional muscles and improve their running technique, resulting in a more intense cardio workout.

Why is Correct Spelling Important?

Correct spelling is essential for several reasons. Firstly, it communicates your message clearly and effectively. Using the incorrect spelling of a term can make your communication inaccurate and difficult to comprehend. Secondly, it embodies respect for the English language and its rules. When spelling words correctly, you demonstrate to others and to yourself that you are proficient in English. Thirdly, good spelling avoids the confusion when researching for information. It makes it easier to discover accurate information and helps search engine algorithms easily identify and rank your content.

The Importance of Good Grammar

Grammar is an integral part of the English language, and good grammar promotes clarity in communication. In a world where much of communication happens online, good grammar is essential to ensure clear communication. Exercises such as the treadmill are already challenging and demanding on the body. Therefore, if the spellings or the grammar used to describe exercises are incorrect, it can add to the difficulty and confusion, leading to potential injury.

Commonly Misspelled Words and Phrases

Here’s a list of commonly misspelled words and phrases associated with treadmill exercises:

  • Threadmill
  • Tredmill
  • Tremmill
  • Tremdill
  • Treamill

In conclusion, treadmills remain one of the most popular fitness equipment due to its benefits. Knowingly or unknowingly, we use it for work or play. However, we must ensure that we stay consistent with the correct spelling of treadmill and related terms.


  • Cohen, J. (2011). Treadmill. Grove Music Online.
  • Barrons Dictionary, (1987), p. 1090, Hauppauge: Barron’s Educational Series.
  • Carter, M. (2009). History of the Treadmill: From Human Power to Electrical Power.

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