Imagine you need to develop a stress model (possibly psychosocial stress) in an individual closed in a chamber of size of an average room. How would you induce psychosocial stress? We excluded timed physical activity (ergometry etc), as it inteferes with our calculations. We don't even know whether such model exist - we need to compare the "stressed" individuals with the "non-stressed" ones under precisely described conditions. Will be happy for any suggestions, Julie