The availability of small, low-cost networked sensors combined with advanced signal processing and information extraction is driving a revolution in physiological monitoring and intervention. Body Sensor Networks (BSN) are enabling technologies for accurate measurements in healthcare systems, enhanced sports and fitness training, novel life-style monitoring, and individualized security. The 2014 International Conference on Wearable and Implantable Body Sensor Networks (BSN 2014) will provide a unique forum for researchers and industry practitioners to discuss the latest work in various fields utilizing body sensor networks. Building on the success of the previous 10 annual meetings, the 11th BSN conference will be held at the Swiss Federal Institute of Technology (ETH Zurich) in Zurich, Switzerland. The main conference and workshops will take place on June 16 - 19, 2014.