Pedometer
Pedometers are devices for measuring the distance traveled by a person when walking and running. Pedometers have long been used by fitness enthusiasts to determine a distance traveled during walking, running, hiking, etc. Pedometers have been used for many years by hikers and long distance walkers to measure the distance traversed. More recently there has been a resurgence in interest in these devices for use in the popular sports of jogging and distance running. A pedometer measures distance by detecting the up and down motion made by the wearer during each stride. The distance traveled by the wearer of a pedometer is the length of the user's stride multiplied by the number of strides the wearer takes. By using a device for measuring time in conjunction with the pedometer, the elapsed time taken to travel a distance can be measured and the average speed can be determined by dividing the distance traveled by the time taken to travel that distance. Pedometers consist of mechanical or electronic circuits which sense the body motion of the user at each step. Typically, such pedometers are worn on the side of the user such as by being clipped to a belt or the waistline of the user's pants in the manner of a pager or the like. Other known pedometers are worn on a user's wrist. In general, both mechanical and electrical pedometers include two components, a first of which is designed to sense the steps of the user, and the second of which processes signals indicative of the steps into useful information. A pedometer typically includes a main body, an acceleration sensor provided in the main body for detecting a pace signal according to motion of the body, and a pace counter for counting the number of paces according to an output of the acceleration sensor. The number of paces is counted from the (up and down) movement of the body during walking (or running). A pedometer is most accurate when attached to the waist of a wearer since attachment to other areas of the body may detect movements that are not related to the stride of a wearer.
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