p style="margin: 0px; text-align: justify;">Most pedometers have a small weighted 'arm' mechanism that is suspended by a small spring that moves up and down as you walk. It is specifically designed to be sensitive to your walking motion - and moves up and down as you walk. Each time the 'arm' moves up and down, a step is counted. While that sounds very simple, the technical components within the pedometer have become very sophisticated and the accuracy of pedometers has improved dramatically over the years.</p