Immediately after crossing the finish line of Stage 5, participants will be reweighed, then seated in the study tent where a fingertip blood sample will be obtained via lancet and capillary collection tube (Mock, Morrison, & Yatscoff, 1995) then analyzed for Na, Cr and BUN (utilizing a Chem-8 cartridge) onsite immediately after collection using an iSTAT® point-of- care analyzer (Abbott; East Windsor, NJ). Any participant who did not complete any stage prior to stage 5 will be removed from the competition and the study. Both the point-of-care device and the digital scale will be calibrated for prior to taking measurements. At this point, the study is over and there is no further participant responsibilities.