Festa, Raúl RicardoMonsalves-Álvarez, MatíasCancino, JorgeJannas-Vela, Sebastián2024-11-262024-11-262023International Journal of Sports Medicine, Vol. 44, N°3, (2023) p. 159-168.0172-4622http://hdl.handle.net/20.500.12254/3910Endurance training results in diverse adaptations that lead to increased performance and health benefits. A commonly measured training response is the analysis of oxygen uptake kinetics, representing the demand of a determined load (speed/work) on the cardiovascular, respiratory, and metabolic systems, providing useful information for the prescription of constant load or interval-type aerobic exercise. There is evidence that during high-intensity aerobic exercise some interventions prescribe brief interval times (<1-min), which may lead to a dissociation between the load prescribed and the oxygen uptake demanded, potentially affecting training outcomes. Therefore, this review explored the time to achieve a close association between the speed/work prescribed and the oxygen uptake demanded after the onset of high-intensity aerobic exercise. The evidence assessed revealed that at least 80% of the oxygen uptake amplitude is reached when phase II of oxygen uptake kinetics is completed (1 to 2 minutes after the onset of exercise, depending on the training status). We propose that the minimum work-time during high-intensity aerobic interval training sessions should be at least 1 minute for athletes and 2 minutes for non-athletes. This suggestion could be used by coaches, physical trainers, clinicians and sports or health scientists for the prescription of high-intensity aerobic interval training.enAtribución-NoComercial-CompartirIgual 3.0 Chile (CC BY-NC-SA 3.0 CL)Endurance trainingHigh-intensity aerobic exerciseOxygen uptake demandedCyclingArticlehttps://orcid.org/0000-0003-4757-483Xhttps://orcid.org/0000-0003-3620-9861http://dx.doi.org/10.1055/a-1929-02951439-3964