Treadmills are stationary cardio machines on which you can walk, jog or run indoors. Treadmills usually feature adjustable speeds and inclines to vary your workout, allowing you to simulate a hill with the push of a button
Advantages
Enable the user to adhere to an indoor exercise regime irrespective of the weather.
Cushioned tread can provide slightly lower impact training than running on outdoor surfaces. .
Incline setting can allow for consistent "uphill" training that is not possible when relying on natural features.
Rate settings force a consistent pace.
Some treadmills have programmes so that the user can simulate terrains, e.g. rolling hills, to provide accurate, programmed, exercise periods.
The user can watch TV whilst using the machine, thus preventing TV watching from being a sedentary activity.
User progress such as distance, calories burned, and heart rate can be tracked.[citation needed]