What it is
Regulatory status: exercise practice
Evidence basis: Human clinical evidence
Repeated high-intensity aerobic intervals stress oxygen delivery and use, driving central and peripheral adaptations that can increase measured VO2 max.
What it is, why people use it, the evidence, and what to know before trying it.
Regulatory status: exercise practice
Evidence basis: Human clinical evidence
Situations where this practice may need modification or professional guidance.
Very hard intervals can provoke musculoskeletal injury, faintness or cardiovascular symptoms. They require appropriate warm-up, recovery and progression; chest pain, fainting or unusual breathlessness warrants medical assessment.
This review does not automatically apply to:
Public protocols that include VO2 max training. Open one to see the full context and source.
One weekly higher-intensity workout geared toward VO2 max in the January 2024 FoundMyFitness routine; also included in his roughly 10-hour week reported by 60 Minutes in October 2025.
Session and schedule patterns reported in public protocols; these are observations, not instructions. Private and hidden usage is excluded.
Continue into interventions that appear alongside this one.