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Updated: Jan 24, 2026

A Real-World High-Intensity Interval Training Protocol for Cardiorespiratory Fitness Improvement
Published on: February 22, 2022
[High intensity interval training in teenagers]
Javiera Abarzúa V1, Williams Viloff C1, Javiera Bahamondes V1
1Escuela de Educación Física, Facultad de Educación, Universidad de las Américas, Santiago, Chile.
Abstract:
This review analyzes the effects of high intensity interval training (HIIT) on muscle and cardiovascular fitness and body composition in teenagers. A search was carried out in international databases, finding 145 papers and selecting five for analysis. In all the reviewed manuscripts, peak oxygen uptake improved after HIIT. In the three manuscripts that measured muscle strength, it also increased. We conclude that HIIT improves muscle strength and cardiovascular fitness in school age children. A 12 weeks protocol with three 12-minute sessions per week would be ideal.
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