Introduction High-intensity interval training (HIIT) became popular fortraining athletes during the early 1950s when Emil Zátopek, anOlympic champion long-distance runner, won the 1952 HelsinkiOlympic 10,000 m race after utilizing HIIT.
Introduction High-intensity interval training (HIIT) became popular for training athletes during the early 1950s when Emil Zátopek, an Olympic champion long-distance runner, won the 1952 Helsinki Olympic 10,000 m race after utilizing HIIT.