The so-called metabolic equivalent is an important indicator to assess exercise and its metabolism, it is an important indicator of the relative energy metabolic level and intensity of exercise, mainly based on the energy expenditure at this time, when sitting in a quiet time. If the metabolic level of the organism during exercise is compared with the metabolic level at rest, this produces some difference, and this value is the value of metabolic equivalent. Therefore, if the metabolic equivalent is used to assess the cardiorespiratory function, generally when quiet with metabolic equivalent can be considered as one equivalent, if the metabolic equivalent during exercise will be greatly increased, these increased values represent the increase in cardiorespiratory function, which reflects the reserve of cardiorespiratory function.