This study will examine the acute effects of high intensity interval ergometry on peripheral concentrations of lactate and hydrogen ions, as well as cognitive function. Approximately 60 healthy, college-aged males will participate in the Wisconsin Card Sorting Task (WCST), a measure of executive function, two times over a span of two weeks. Prior to the WCST, participants will complete either a warm-up, a warm-up and high intensity interval exercise, or a stationary period. Changes in lactate, pH, and WCST score will be evaluated between and within groups in relation to the presence of the high intensity exercise stimulus.
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Peripheral Blood Lactate
Timeframe: 8 times total; 2 at Baseline (Day 1; Minute 14 and Minute 29), 3 in session 1 (Day 3; Minute 2, Minute 18, and Minute 29), and 3 in session 2 (Day 17; Minute 2, Minute 18, and Minute 29); Maximum Time Frame at Session 2 (Day 17, Minute 29)
Peripheral Hydrogen Ions, Peripheral Blood pH
Timeframe: 8 times total; 2 at Baseline (Day 1; Minute 14 and Minute 29), 3 in session 1 (Day 3; Minute 2, Minute 18, and Minute 29), and 3 in session 2 (Day 17; Minute 2, Minute 18, and Minute 29); Maximum Time Frame at Session 2 (Day 17, Minute 29)
Executive Function
Timeframe: 2 times total, 1 in session 1 (Day 3; Minute 20), 1 in session 2 (Day 17, Minute 20); Maximum Time Frame at Session 2 (Day 17, Minute 20)