Inclusion Criteria:  Physically active (at least 30 minutes of exercise 3-5 days per week) male been cleared by the medical monitor for this study Have a VO2max >45ml/kg/min  Exclusion Criteria:  Have a current musculoskeletal injury that would limit their physical activity or preclude the participant from walking, jogging, running, sprinting, or cutting. Chronic health problems that affect your ability to thermoregulate (disorders affecting the liver, kidneys or the ability to sweat normally) Fever or current illness at the time of testing History of cardiovascular, metabolic, or respiratory disease A family member died for no apparent reason, had a heart attack, died from heart problems, or sudden death before the age of 50 Current musculoskeletal injury that limits their physical activity Currently taking a medication that is known to influence body temperature (amphetamines, antihypertensives, anticholinergics, acetaminophen, diuretics, NSAIDs, aspirin) Are a female. Due to the internal body temperature gradient that accompanies the menstrual cycle, inclusion of females may not provide the most controlled internal body temperature data for this study. Have a history of heat related illness Throat or gastroesophageal diseases including gastroesophageal reflux disease (aka, GERD) or difficulty swallowing Have any allergies or adverse reactions to the cold (e.g. Cold Urticaria, Raynauds Phenomenon/Disease, or cryoglobulinaemia) Any COVID-19 related symptoms including fever, cough, shortness of breath or difficulty breathing, gastrointestinal discomfort (nausea, vomiting, and/or diarrhea), repeated shaking with chills, muscle pain (unrelated to exercise), headache, sore throat, new loss of taste or smell, congestion or runny nose. Participant with clinical diagnosis of COVID-19 infection or positive result on a COVID-19 test due to concern about cardiac complications.