Work-To-Rest Ratios

Inclusion Criteria: * Healthy 18-39 year old individuals * Physically active Exclusion Criteria: * History of cardiovascular, metabolic, respiratory, neural, or renal disease * Hypertensive or tachycardic during the screening visit (systolic blood pressure ≥ 140 mmHg, diastolic blood pressure ≥ 90 mmHg, resting heart rate ≥ 100 bpm) * Taking medication or supplements with a known side effect of affecting physiologic responses to exercise (e.g., acetaminophen, beta blockers, statins, aspirin) * Any form of tobacco or nicotine use in the past six months * Current musculoskeletal injury impacting physical activity * A positive pregnancy test at any point in the study * Study physician discretion based on any other medical condition or medication