Systems and techniques relating to evaluating performance characteristics areprovided.One or more fitness devices, for example, a ball and/or a mat, may havesensors for measuring auser's actions during an activity protocol, such as a testing drill. Sensorconfigured to detect ifthe fitness device meets operational criteria are disclosed. In oneembodiment, the fitness devicemay comprise a ball and the operational criteria may relate to the weight,dimensions, and/orinternal pressure of the ball. In one embodiment, data from fitness device(s)may be used tocalculate a score. In other embodiments, a score may be calculated； however,it may not beassociated with credentials or certified if an operational criteria is notmet.
