Perspective
dizziness, nausea, vomiting
ADVERSE EFFECTS
The present study may guide the public, coaches, and athletes towards selecting the most suitable interval format for aerobically well‐trained men, depending on the purpose of prescribing exercise. If the objective is to improve V̇OA noteworthy difference between HIIT 4 × 4 min and the SIT formats is that the former is not performed with a maximal effort while the latter are. Individuals reach absolute exhaustion during the SIT protocols, either at the end of each interval (SIT 10 × 30 s) or at the end of the last interval (SIT 8 × 20 s). Anecdotally, we experienced several non‐severe adverse effects during the SIT interventions, such as nausea, vomiting, and dizziness. Therefore, it should be questioned if the extremely intense and fatiguing nature of SIT is appropriate in many populations, such as elderly and patients.