Choice reaction time (CRT)
hypoxia
HYPOXIC, HYPOXIA
The Visual Choice Reaction Time Apparatus (Model 63035A, Lafayette Instrument Company, Indiana, USA) was used to measure CRT. A four-choice compatible stimulus–response paradigm was used. The participants sat comfortably in a chair in front of the response panel having four lights and corresponding response buttons beneath each light. Five randomized visual stimuli (lights turning on) were manually given to the participants and they were instructed to respond as quickly as they could by pushing the corresponding button on the response panel. The reaction time in each stimulation was recorded and the mean value of 5 efforts was calculated as each subject’s final score of CRT. The CRT was performed at the beginning of each experimental session (before hypoxic exposure) and immediately after exhaustion in the endurance task under hypoxia.