A pedometer or step counter is a device, in modern times usually portable and electronic or electromechanical, that counts each step a person takes by detecting the motion of the person's hips. Because the distance of each person's step varies, an informal calibration performed by the user is required if a standardized distance (such as in kilometres or miles) is desired. Used originally by sports and physical fitness enthusiasts, pedometers are now becoming popular as an everyday exercise measurer and motivator.
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