ABSTRACT

Estimation of the contribution of the aerobic energy system is relatively simple, and is usually achieved via indirect calorimetry. The anaerobic contribution to exercise might then be considered as the difference between the total energy required and the aerobic contribution to a specific task. Therefore, anaerobic capacity estimates derived from both a maximal accumulated oxygen deficit method (MAOD) test and changes in muscle metabolites should be highly correlated. Consistent with this notion, some, studies have reported the MAOD to be quantitatively similar to estimates of anaerobic adenosine triphosphate production determined from muscle biopsies. Good reliability of the anaerobic capacity derived from a MAOD test has also been reported for moderately trained participants. Shorter maximal exercise duration leads to a reduction in MAOD, which appears to be due to submaximal use of the anaerobic lactic capacity. This assumption is supported by the observation of higher post-exercise lactate values when supramaximal exercise duration is extended.