Abstract: A method implemented by a wearable performance measurement system, for determining and communicating a performance measure, includes selecting a mode of operation of the wearable performance measurement system from a plurality of configured modes of operations. Each mode of operation has a corresponding configured performance measure and configured feedback technique. At least one of the configured performance measure or the configured feedback technique is different for each mode of operation. The method also includes using a set of sensors of the wearable performance measurement system to detect at least one physical movement of a person. The method further includes, determining a type of physical activity from the at least one detected physical movement, and determining a performance measure corresponding to the selected mode of operation. The method also includes communicating an indication of the determined performance measure using the feedback technique corresponding to the selected mode of operation.