The objective of this project is to quantify the immunoendocrine response to acute stress events combining both physical and psychological challenges. This work will serve as a pilot project examining differential stress induction in response to exercise. Participants will have an instructor with prior military training lead a two-hour training session for 10 recreationally fit male volunteers. You will be randomly assigned to a high-intensity training group to participate in the "military style" training and a low-intensity training group who will participate in a low-intensity cardiovascular training protocol. Blood samples will be collected from you prior to and following the exercise session and these samples will be analyzed for endocrine measures as well as markers of immune function to include chemokines and cytokines.
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T cell proliferation
Timeframe: 6.5 hours