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Updated: Jun 29, 2025

A Real-World High-Intensity Interval Training Protocol for Cardiorespiratory Fitness Improvement
Published on: February 22, 2022
A narrative review exploring advances in interval training for endurance athletes
Knut Sindre Mølmen1, Bent R Rønnestad1
1Section for Health and Exercise Physiology, Inland Norway University of Applied Sciences, Lillehammer, Norway.
Abstract:
Interval training is considered an essential training component in endurance athletes. Recently, there has been a focus on optimization of interval training characteristics to sustain a high fraction of maximal oxygen consumption (≥90% VO2max) to improve physiological adaptations and performance. Herein, we present a synopsis of the latest research exploring both acute and chronic studies in endurance athletes. Further, a decision flowchart was created for athletes and coaches to select the most appropriate interval training regime for specific individualized goals.
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