The Validity of CORE Sensor in Heat Training for Male and Female Endurance Athletes

Inclusion Criteria: * Highly trained or elite athlete * Nonsmokers * Able to read and speak English * No underlying cardiovascular limitations Exclusion Criteria: * Currently or previously a habitual smoker (nicotine/cannabis) * Pregnant, breast feeding, trying to conceive, undergoing treatment to increase sperm count * Those taking medications that affect cardiovascular function, with the exception of oral contraceptives * History of stroke, clotting disorders or venous thrombosis * A history of heat illness or heat injury * History of obstructive diseases of the gastrointestinal tract including diverticulosis, diverticulitis, inflammatory bowel disease, peptic ulcer disease, Chron's disease, ulcerative colitis, or previous GI surgery