Body Area Sensor Networks are low cost sensor networks, very often wireless, that are designed to sense physiological parameters, such as, e.g., heart rate and blood pressure, and that allow easy access to user\'s critical and non-critical data. Among the wide range of application fields which can benefit from the use of BASNs, the ones related to health care are particularly appealing, since the capacity of continued monitoring, on-line data processing and in-time communication with the user and/or with health-care professionals promises both better quality of life to persons affected by possibly serious illnesses and preventive health-care to a wider set of potential users (in particularly, to an elderly population). BASNs may also represent a fundamental tool for athletes and fitness enthusiast seeking to improve their performances while not exceeding their physical limitations. 

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