ABSTRACT
This section will concentrate on the important circulatory and respiratory adjustments that are needed for aerobic exercise. In fact, this common way of looking at exercise physiology is really quite wrong. To quote Barcroft (writing in 1937): “The condition of exercise is not a mere variant of the condition of rest, it is the essence of the machine.” Thus, in many ways the norm, in the world in which our bodies evolved, must have been exercise, and in studying exercise physiology we are really studying the situation for which our bodies, including our circulatory and respiratory systems, evolved.
