Dehydration Cognition

A baseline series of brain function tests will be performed. Following this, participants will complete a 24 hour fluid and water rich food restriction on the day proceeding testing. Participants will then complete moderate to high intensity exercise in a hot/humid room to achieve 5% body mass loss. Once baseline core body temperature returns to baseline levels, the series of brain function tests will be performed. Participants will then consume a sports drink equal to the volume of sweat lost over the course of a 2 hour recover period. Following this, he series of brain function tests will be performed.

Inclusion criteria

• Healthy
• Recreationally active
• 18-26 years old

Exclusion criteria

• History of cardiovascular, metabolic, respiratory, neural, or renal disease
• Hypertensive (systolic blood pressure ≥ 140 mmHg, diastolic blood pressure ≥ 90 mmHg) or tachycardic (resting heart rate ≥ 100 bpm) during the screening visit
• Taking medication or supplements with a known side effect of affecting physiological responses to exercise (e.g., aspirin, acetaminophen, beta blockers, statins, stimulants, depressants, SSRIs)
• Tobacco or nicotine use in the past six months
• Current or past musculoskeletal injury impacting physical activity
• Study physician discretion based on any other medical condition or medication