Activity monitoring systems and methods of operating same. Yuen, Shelten Gee Jao Park, James Friedman, Eric Nathan. A method of determining displacement of a user on foot, the method comprising the following steps: generating a set of accelerations corresponding to foot impacts of the user on a surface determining a peak acceleration in the set of accelerations comparing the peak acceleration to a predetermined minimum threshold value comparing, if the peak acceleration is above the predetermined minimum threshold value, a period of time from a previously detected footstep to the determined peak acceleration determining whether the period of time is greater than a.Ī method of determining displacement of a user on foot, the method comprising the following steps: generating a set of accelerations corresponding to foot impacts of the user on a surface determining a peak acceleration in the set of accelerations comparing the peak acceleration to a predetermined minimum threshold value comparing, if the peak acceleration is above the predetermined minimum threshold value, a period of time from a previously detected footstep to the determined peak acceleration determining whether the period of time is greater than a predetermined minimum threshold period of time storing the determined peak acceleration as a detected footstep, if the period of time is determined to be greater than the predetermined minimum threshold period of time and multiplying stored detected footsteps by a scale factor to thereby determine the displacement of the user on foot.
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