TY - JOUR AU - Flynn, T W; Connery, S M; Smutok, M A; Zeballos, R J; Weisman, I M TI - Comparison of cardiopulmonary responses to forward and backward walking and running JO - Med Sci Sports Exerc VL - 26 PY - 1994 L3 - PubMed-ID: 8133744 SP - 89 EP - 94 ER -