To provide footwear that includes one or more electronic modules for providing module activation/authentication information and/or data processing algorithm selection information.

As the user 104 moves, devices provided in the modules 102 mounted to or included in the footwear 100 will measure one or more physical or physiological characteristics associated with the motion and/or with the use of the footwear, or perform other desired functions. The data may be transmitted to the user or others, e.g., via wireless transmission devices 106 optionally included as part of the module 102 or the article of footwear 100.