| http://www.w3.org/ns/prov#value | - The aforementioned body motion sensor 203 may be replaced by a sensor for detecting the amount of work done by the user such as a device for measuring the distance run by the user as well as the speed of the running motion in the case of a running exercise on a tread mill as shown at 202 in FIG. 11, or both the body motion sensor 203 and such a device may be provided.
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