Abstract: The Exernet system enables the development of an exercise prescription via the Internet by a medical or healthcare professional, the implementation of safety limits and/or parameters, the delivery of the prescription, and the execution of the exercise prescription directly to a device via the internet and the collection, storage, reporting and presentation of the physiologic data collected from each exercise prescription session. The end user (patient or client) simply logs into the system and presses “start”. The individualized prescription is then executed. The Exernet system also enables the analysis and review of the prescription and physiological data generated by the user and device to be viewed real time or at a later time via the internet for further analysis and adjustment to the prescription. The system also addresses the problems with self-reported data.