“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 traditionally refers to a type of mill which was operated by a person or animal treading steps of a wheel to grind grain.
As a cardiovascular exercise:Running or walking on a treadmill can be an effective way to work out, like other complex cardiovascular exercises (similar to non-treadmill walking/running). As with all exercise, regular treadmill use increases endurance.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.As an indoor activity:Users who would not run/walk outdoors (e.g. due to unfavorable weather conditions, uneven road surfaces, dangerous neighborhoods or unwanted attention) may use an indoor treadmill.Users who do not wish to join a gym may use an indoor treadmill at home.Users can do other things while exercising, such as watching television or reading.As a machine:Enables exact calculation and adjustment of slope and speed.As most of the factors of the activity are known, the energy expended may be calculated.Some treadmills have special features such as step count, heart rate monitors, amount of calories expended.”