Validity of the 3 min step test in moderate altitude: environmental temperature as a confounder. - Chen, Shu-Man; Jung-Shi Wang; Wen-Chih Lee; Chien-Wen Hou; Chung-Yu Chen; Yi-Hung Laio; Ching-Hung Lin; Chia-Hua Kuo (Applied Physiology, Nutrition & Metabolism, 2006)