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Abstract
Effects of a Nine-Week High-Intensity Interval Training Program on Anaerobic Performance and Physical Readiness in Military University Cadets: A Randomized Controlled Trial
Jan Florian · Vicente Javier Clemente-Suárez · Jan Pařík · Michal Polách
Phys Act Rev. 2026;14(2):68-79. | DOI: 10.16926/par.2026.14.22
High-intensity interval training (HIIT) is recognized as a time-efficient method for enhancing physical fitness. However, its effects in military populations, who require multifaceted development of physical capabilities and psychological resilience, warrant further investigation, particularly in comparison with conventional training approaches. This study aimed to compare the effects of a structured nine-week HIIT program with conventional physical training on anaerobic performance, body composition, and subjective perceptions of stress management and physical readiness in military university students. A two-arm, parallel-group randomized controlled trial was conducted with 61 first-year cadets (47 men, 14 women) from the University of Defence, Czech Republic. Participants were randomly allocated to either an intervention group (HIIT; n = 33) or a control group (CON; n = 28). The HIIT group performed two 90-minute weekly sessions featuring a periodized blend of interval running and high-intensity functional training, while the control group followed a standard, non-structured physical education curriculum. Within-group analyses showed a significant improvement in mean anaerobic power in the HIIT group (p < 0.001; effect size = 0.85), whereas the control group showed a non-significant change (p = 0.132; effect size = 0.33). Between-group differences were not statistically significant (p = 0.151), although the effect size indicated a small-to-moderate trend favouring HIIT. No significant differences were observed for body composition. At seven-month follow-up, mean anaerobic power in the HIIT group remained above baseline values without significant between-group differences. Participants in the HIIT group reported significantly higher perceived physical readiness (p < 0.01) and overall program evaluation (p < 0.05). These findings suggest that structured HIIT may represent a promising and time-efficient training approach in military university settings, although further research with larger samples is needed.