In the first session, participants will be screened using a standard health questionnaire. Interested participants will sign a consent form. They will then undergo testing of maximal oxygen consumption (VO2peak) using a treadmill. Subjects will also familiarize themselves with the physical and mental performance tests: Stroop test, profile of mood states (POMS), isometric strength test and an isokinetic muscle fatigue test. Following this initial session, participants will complete 3 trials (placebo, AA or 2AA drink formula) in random order.