| 摘要 |
One disclosed method involves identifying a grade of the surface with at least one device supported by the user while the user is in locomotion on foot on a surface, and determining a performance parameter of the user with the at least one device based upon the identified grade of the surface. Another disclosed method involves identifying a grade of a surface based upon a measured physiological parameter of a user in locomotion on foot on the surface. Another disclosed method involves identifying an average foot contact time of a user during a first outing, identifying an average pace of the user during the first outing, and determining a relationship between foot contact times of the user and corresponding paces of the user, wherein the relationship is based upon the average foot contact time and the average pace identified during the first outing, and wherein no other average foot contact times and no other average paces identified during any different outings by the user are used to define the relationship. Another disclosed method involves determining a single user-specific calibration constant that defines a relationship between foot contact times of a user and corresponding paces of the user, wherein no other user-specific calibration constants are used to define the relationship.
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