Cardio-pulmonary testing enables precise measurements to be recorded of the oxygen taken into the body at the level of the lungs which is then transported by the cardiovascular system to be used for the production of ATP in the mitochondria of our cells. Heart rate in response to increased oxygen requirements is also assessed. This form of testing provides in-depth and valuable information of an individuals cardiovascular and respiratory fitness level. It also widely used for exercise stress testing in clinical populations. Cartwright Fitness provides a number of the most efficient, effective and inexpensive, high-quality gas analysis devices.