The VO2max, or rate of oxygen uptake during maximal exercise, is widely accepted as the criterion measure of cardiorespiratory fitness. Finally, we already covered the evidence that establishes a low level of CRF as an independent risk factor for all-cause and cardiovascular mortality and other research studies, which clearly demonstrate the importance of CRF. Cardio fitness, in combination with other exercise test measurements, can provide valuable clinical information, both prognostic and diagnostic, for patients with or without chronic diseases. The individual with low cardio fitness will only be able to perform these same activities, if at all, with maximal or near maximal effort and will fatigue quickly. The highly fit individual can easily perform occupational and recreational activities that require daily activities, such as carrying groceries upstairs, riding a bicycle at moderate speed, shoveling snow, or playing singles tennis. This can be demonstrated in part by comparing two individuals with high or low cardio fitness. Purely from a fitness perspective, level of cardio fitness can be used to provide motivation for an individual considering participation in a physical activity or exercise program, to individualize the exercise prescription, and to track progress within an exercise program.Īnother important value of the assessment of CRF is that it directly relates to an individual’s ability to perform daily tasks. There are many desirable outcomes from the assessment of the cardio fitness. Every physical fitness evaluation should include an assessment of cardiorespiratory function during both rest and exercise. It represents the ability to perform dynamic exercise involving large muscle groups at moderate-to-high intensity for prolonged periods. Cardiorespiratory endurance is one of the most important components of physical fitness.
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