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Salivary amylase and stress during stressful environment: three Mars analog mission crews study.

After the establishment of the space age physicians, human factors engineers, neurologist and psychologists and their special attention to work on people's capability to meet up the physical, psychological, neuroscience and interpersonal strains of working in space, it has been regarded as an issue that seeks urgent consideration. Not study was conducted on effect of simulated Mars analog environment on stress and salivary amylase. So, this study aimed to confirm whether salivary amylase is act as stress biomarker in crew members who took part in Mars analog mission in an isolated and stressful environment. The 18 crew members were selected who took part in Mars Analog Research Station, Utah. Salivary amylase was measured using a biosensor of salivary amylase monitor and State-Trait Anxiety Inventory score at pre-extravehicular activity, post-extravehicular activity and on before mission. The state and trait anxiety scores at pre-extravehicular activity for each commander were elevated as compared to after extravehicular activity. There were significant differences in the state and trait anxiety scores between before extravehicular activity and after extravehicular activity of Commander and other members, also there were significant differences in values of before-extravehicular activity between commanders and other members. There were significant differences in values of salivary amylase at before extravehicular activity and after extravehicular activity between commander group and other members. There was significant correlation between salivary amylase and state and trait anxiety scores in all groups. Measuring salivary amylase level could be useful for stress assessment of crew members and population working in a stressful and isolated environment.

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