A Treadmill is a device that is generally used for running or walking or climbing while staying at the place. It is used as a machine for exercise and keeping the body fit it by moving on the continuous moving belt on which a person needs to run or walk. It is a device of constant exercise that can be performed both at home and in the gym. It helps in continuous walking which is a new form of exercise within a stipulated time and speed. The scale of speed can be increased with the device depending on the capacity of the person who is exercising using the device. By walking on the treadmill, strength and endurance are developed within a person that is appreciable regardless of the fitness level. The machine can be used for jogging and interval training.

Pros and Cons of Treadmills

Pros

•   - A treadmill is quite convenient to use and exercise at any place be it at home or in the gym.
•   - The risk of tripping is reduced with the treadmill as it has a predictable surface that is quite easier to negotiate than curbs, sidewalks, or trails.
•   - In the treadmills, the users have the convenience of designing custom programs to set the time they need to exercise.
•   - Exercising using a treadmill burns a lot of calories faster than most other forms of simple exercises.
•   - By using the treadmill, all the aspects of the exercise can be controlled like the warm-up period, incline, speed, energy spend, and the cool down period.
•   - Exercising in treadmill helps in treating the lower back pain well.    

Cons

•   - The personalized treadmills are quite expensive to use.
•   - The treadmills cannot be folded up, and thus it takes a lot of space. 
•   - It provides a limited form of exercise which might not solve every purpose of keeping the body fit.
•   - Few treadmills have a loud sound of the motors that might disturb the activities to be carried on beside the machine.
•   - There needs the involvement of a professional for the maintenance of the machine in case of any fault.

About Manual Treadmill

As the name suggests, a manual treadmill is powered by the user itself, which is referred to as the non-motorized treadmill. The user has the control over the belt in a manual treadmill to rotate it at their desired speed. It gives an intense workout to the lower part of the body as all the force comes from the legs and not from the machine. But the manual treadmill can be hardly used for running as it reaches a maximum speed of 3.5 to 4.0 miles per hour. The manual treadmill executes with the action of the feet of the user that moves the belt against the deck. The belt only moves if the user moves it. Exercising on a manual treadmill has a lot of fitness benefits that can get the heart rates of the user into a higher zone at a lower speed. Apart from the two categories of the treadmill- manual and motorized, a new category of the treadmill has been introduced in the market, i.e. the curved belt non-motorized treadmill.

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