Development of a real-time vital data collection system from players during a football game

In order to plan effective training menus and avoid injuries and diseases, vital signs monitoring for athletes during training and game is essential, where a key issue is how to collect vital data reliably and in real-time from many people spread in a large field. To realize such a real-time vital data monitoring system, we developed prototype wireless vital sensor nodes, and conducted twice field experiments to evaluate the packet success rate (PSR), where we put the sensor nodes to the waists of 22 players and collected packets from all of them during a football game. In this paper, we present the detail of the real-time vital data collection system composed of the prototype sensor nodes and data collection nodes, and discuss the experimental results in terms of PSR and diversity gain.