INTRODUCTION
Maximal oxygen uptake (V̇O
Maximal oxygen uptake (V̇OGiven the great importance for long‐distance endurance performance, a critical question is which training modality may yield the most potent V̇OSupramaximal sprint interval training (SIT) is another intermittent format that is advocated for effective improvements in V̇OFor HIIT and SIT, there is a trade‐off between intensity and volume, and they may both be organized with recovery periods ranging from a few seconds (~10 s) to several minutes. It is, by definition, the intensity (i.e., work output) that distinguishes HIIT and SIT from each other. The very high absolute intensity during SIT (≥150% of MAS) necessitates short intervals, and its potential to accumulate a high metabolic volume at ≥90% of V̇OGiven the great importance of V̇O