A magazine (pdf) about the biological systems behind how we move. For more: www.wellcome.ac.uk/bigpicture/exercise. Includes the skeletal and muscular systems, and why and how humans move. We look at how oxygen gets into our bodies and is used to transfer energy from our food. We consider some of the mental aspects of exercise and sport as well as the ethics of enhancing performance by drugs, prosthetics. Includes interviews with a sports psychologist, paralympic swimmer and scientific researcher. For more articles, a poster on cellular respiration, image galleries, videos and lesson ideas