C. Campos Jara, C. Oyarzún Barría, V. Carrasco Alarcon, C. Martínez Salazar, and R. Ramirez Campillo, “Response of the heart rate, blood lactate and perceived exertion in a group of women during interval mode spinning® sessions”, Revista Ciencias de la Actividad Física UCM, vol. 13, no. 13, pp. 37-43, Dec. 2012.