The measurement of vo2 max represents the standard against which any estimate of CRF is compared. Vo2, increases with increasing loads on a GXT until the maxi mal capacity of the cardiorespiratory system is reached. attention to detail is crucial if one is to obtain accurate values (72). The primary criterion for having achieved a true VO2 max is that the VO2, fails to increase when the workload is increased yielding a plateau in the voz. To assist in the determination of a plateau, the classic study by Taylor et al. (107) operationally defined the plateau for their test procedures (7 mph, 2.5% grade change per stage of the test) as a voz increase of less than 150 ml min or 2.1 ml kg min between stages of the test. However, a plateau is observed in only about 50% of healthy adult subjects. As a result, a number of secondary criteria were developed to provide some objective evidence that the highest vo2 measured was vo2max. These secondary criteria included
>A post-exercise blood lactate concentration of >8 mmoles. L' i (S)
>An R exceeding 1.15 (55) All of the secondary criteria were developed using discontinuous GXT protocols using predominate
The measurement of vo2 max represents the standard against which any estimate of CRF is compared. Vo2, increases with increasing loads on a GXT until the maxi mal capacity of the cardiorespiratory system is reached. attention to detail is crucial if one is to obtain accurate values (72). The primary criterion for having achieved a true VO2 max is that the VO2, fails to increase when the workload is increased yielding a plateau in the voz. To assist in the determination of a plateau, the classic study by Taylor et al. (107) operationally defined the plateau for their test procedures (7 mph, 2.5% grade change per stage of the test) as a voz increase of less than 150 ml min or 2.1 ml kg min between stages of the test. However, a plateau is observed in only about 50% of healthy adult subjects. As a result, a number of secondary criteria were developed to provide some objective evidence that the highest vo2 measured was vo2max. These secondary criteria included >A post-exercise blood lactate concentration of >8 mmoles. L' i (S) >An R exceeding 1.15 (55) All of the secondary criteria were developed using discontinuous GXT protocols using predominate
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