Marcelo Coertjens (MC) is currently Associate Professor of the Physiotherapy Course and the Postgraduate Program in Biomedical Sciences at Universidade Federal do Delta do Parnaíba - UFDPar (campus located on the coast of Piauí in Parnaíba city which originated from the Universidade Federal do Piauí, Brazil). Department head of Physiotherapy Course. He teaches Biochemistry, Human Physiology, Exercise Physiology and Biomechanics (graduate), Physio-mechanics of Locomotion and Physio-mechanics of Respiration (postgraduate). My field of research is mainly energy expenditure and its implications on health and performance, with specific interest into respiratory physiology, locomotion energetics, physical training, comparative and environmental physiology. I work in four main lines of research: i) biomechanics and energetics aspects of locomotion under different constraints; ii) physio-mechanics of breathing; iii) pulmonary rehabilitation; iv) locomotor rehabilitation.