Journal of Applied Physiology· 2017Q1
Measurement of the maximum oxygen uptake V<scp>o</scp><sub>2max</sub>: V<scp>o</scp><sub>2peak</sub> is no longer acceptable
- 511citations
- Q1SCImago
- 2017year
Short summary
A new protocol combining a ramp test with a subsequent constant work rate test at 110% of peak work rate reliably establishes the V̇o₂max plateau, resolving inaccuracies from secondary criteria used with ramp tests alone.
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Key points
- Ramp exercise tests often fail to produce an unambiguous V̇o₂-work rate plateau, necessitating the use of less reliable secondary criteria for V̇o₂max estimation.
- Secondary criteria like RER, maximal heart rate, and lactate levels can be arbitrarily chosen, leading to inaccurate V̇o₂max measurements.
- A proposed protocol combines a ramp test with a constant work rate test at ~110% of the ramp test's peak work rate to ensure a definitive V̇o₂max plateau.
- This combined protocol has been validated across a wide range of populations, including children, adults, and patients.
AI-generated from the title and abstract; the full text is not read.
Abstract
The maximum rate of O 2 uptake (i.e., V̇o 2max ), as measured during large muscle mass exercise such as cycling or running, is widely considered to be the gold standard measurement of integrated cardiopulmonary-muscle oxidative function. The development of rapid-response gas analyzers, enabling measurement of breath-by-breath pulmonary gas exchange, has facilitated replacement of the discontinuous progressive maximal exercise test (that produced an unambiguous V̇o 2 -work rate plateau definitive for V̇o 2max ) with the rapidly incremented or ramp testing protocol. Although this is more suitable for clinical and experimental investigations and enables measurement of the gas exchange threshold, exercise efficiency, and V̇o 2 kinetics, a V̇o 2 -work rate plateau is not an obligatory outcome. This shortcoming has led to investigators resorting to so-called secondary criteria such as respiratory exchange ratio, maximal heart rate, and/or maximal blood lactate concentration, the acceptable values of which may be selected arbitrarily and result in grossly inaccurate V̇o 2max estimation. Whereas this may not be an overriding concern in young, healthy subjects with experience of performing exercise to volitional exhaustion, exercise test naïve subjects, patient populations, and less motivated subjects may stop exercising before their V̇o 2max is reached. When V̇o 2max is a or the criterion outcome of the investigation, this represents a major experimental design issue. This CORP presents the rationale for incorporation of a second, constant work rate test performed at ~110% of the work rate achieved on the initial ramp test to resolve the classic V̇o 2 -work rate plateau that is the unambiguous validation of V̇o 2max . The broad utility of this procedure has been established for children, adults of varying fitness, obese individuals, and patient populations.
The authors' abstract, as published at the source. Journal of Applied Physiology, 2017 · DOI ↗
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Field: Complementary and alternative medicine
Complementary and alternative medicineMedicine