The Science Behind PAI [INFOGRAPHIC]

Cardiorespiratory fitness, or CRF for short, is the ability of the circulatory and respiratory systems to supply oxygen to skeletal muscles during sustained physical activity. Measuring V02 max, or how much oxygen a person can utilize during intense exercise, is the most precise measure of CRF. 

Take a look at the below infographic to learn more about the science behind PAI and why we value heart health so much. Or, click here to see the PDF version

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