Rubio Luque, M.D.; Escribano, Begoña M.; Castejón Montijano, F.; Agüera Carmona, Sergio; Agüera, Estrella I. (Universidad de Córdoba, Servicio de Publicaciones, 1994)
We carried out a tour-step test in which exercise was gradually intensified over a distance of 1000 m on a semielliptic sand track, in which the heart rate was 115-125 (120), 140-150(145), 165-175 (170) y 185-195 (190) ...