This study seeks to examine the effectiveness of training while in a hyperoxic-hyperbaric
environment for exercise performance at altitude. Subjects will complete a short,
high-intensity interval training (HIT) program inside the hyperbaric chamber.Before and after
this training phase, all subjects will be tested for maximum aerobic capacity at a simulated
high altitude of 15,000ft in a hypobaric chamber, as well as for molecular markers of
mitochondrial oxidative capacity in a skeletal muscle biopsy.

A group of individuals of similar characteristics completing this training program in a
normoxic-normobaric environment will serve as a control.