- There are currently no gold standards or threshold measures for stress or arousal in youth or in adults. However, Firstbeat technologies (http://www.firstbeattechnologies.com/) has been working to develop stress and recovery analysis in collaboration with several research projects in the area of stress measurement and autonomic nervous system (ANS) function, applying also research in the fields of exercise physiology, behavioral sciences, and applied mathematics. We will work with Firstbeat to explore development of guidelines for measurement and definition of cut-points for stress in youth. We will begin the design of multi-modal signal processing algorithms for determining personalized cut-points for individual youths.