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Effects Of A 12-Week High-Intensity Interval Training Versus Moderate-Intensity Continuous Training Programme On Aerobic Capacity And Body Composition In Mixed-Sex University Athletes: A Randomized Controlled Trial

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  • Karimov Bekzod Boyqobilovich

    (University of Economy and Pedagogy)

Abstract

Background: High-Intensity Interval Training (HIIT) has emerged as a time-efficient alternative to Moderate-Intensity Continuous Training (MICT) for improving cardiorespiratory fitness and body composition. However, comparative evidence among mixed-sex university athlete populations using extended 12-week protocols remains limited. Objective: This randomized controlled trial aimed to compare the effects of 12-week HIIT and MICT programmes on maximal oxygen uptake (VO₂max), body composition, and resting heart rate in university athletes. Methods: Thirty university athletes (n = 18 males, n = 12 females; mean age 21.4 ± 2.1 years) were randomly allocated to either a HIIT group (n = 15) or a MICT group (n = 15). The HIIT protocol consisted of 4 × 4-minute intervals at 85-95% of maximum heart rate (HRmax) with 3-minute active recovery periods, performed three sessions per week. The MICT protocol involved continuous treadmill running at 60-70% HRmax for 40 minutes, three sessions per week. Primary outcomes - VO₂max (20-metre multistage fitness test), body fat percentage (bioelectrical impedance analysis), and resting heart rate - were assessed at baseline and post-intervention. Statistical analyses included paired-samples t-tests, independent-samples t-tests, two-way repeated-measures ANOVA, Cohen's d effect sizes, and 95% confidence intervals. Results: Both groups demonstrated significant within-group improvements across all outcomes (p

Suggested Citation

  • Karimov Bekzod Boyqobilovich, . "Effects Of A 12-Week High-Intensity Interval Training Versus Moderate-Intensity Continuous Training Programme On Aerobic Capacity And Body Composition In Mixed-Sex University Athletes: A Randomized Controlled Trial," Synoptic: International Journal of Multidisciplinary Research, Synoptic Publisher, vol. 2(1), pages 1-14.
    • Handle: RePEc:snp:journl:art-1780286378619
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