In this work developments are presented, which shift the technological frontiers in the field of powering and data communication for wearable and implantable medical systems and which may help the introduction of ambulatory monitoring and ambient intelligence in the near future. Inductive power transmission is proposed as a way to provide power to wearable and implantable electronic devices. The design trajectory of an inductive link is covered and optimization methods are proposed and successfully illustrated with an example. Next, the integration of bidirectional data transmission in the...