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

This study is to verify the claims of CORE™ body temperature system to estimate core body temperature from skin temperature and heart rate during exercise under varying environmental conditions. Subjects will ingest a temperature sensing pill and be outfitted with skin temperature sensors, a chest strap heart rate monitor, and the CORE and CaleraResearch devices. Athletes will run or cycle in hot/dry and hot/humid conditions for 45 minutes at an absolute workload of 60% VO2 Max/Peak.