Human exercise physiology

摘要: The oxygen transport system in the human body is described from atmospheric air to working skeletal muscles. It illustrated that pulmonary diffusion capacity becomes critical during whole exercise as arterial tension decreases markedly. Furthermore, Bohr effect on oxyhaemoglobin dissociation curve means that, with a lowering of pH below 7.0, saturation may decrease 90%. In addition, ability increase cardiac output limits when several muscle groups at same time, and blood flow reduced by approximately 30% compared times only single group activated. Oxygen myocytes thereby affected, while endurance training enhances volume number capillaries surrounding cells well size heart, thus increases maximal uptake 50%.