Template-Type: ReDIF-Article 1.0
Title: EFFECTS OF HIGH-INTENSITY INTERVAL TRAINING VERSUS MODERATE-INTENSITY CONTINUOUS TRAINING ON CARDIORESPIRATORY FITNESS, BODY COMPOSITION, AND PSYCHOLOGICAL WELL-BEING IN SEDENTARY YOUNG ADULTS: A RANDOMIZED CONTROLLED TRIAL
Author-Name: Rajapov G'olibbek Oripovich
Author-Email: rajapovgolibbek@gmail.com
Author-Workplace-Name: University of Economy and Pedagogy
Abstract: Background: Physical inactivity is a leading modifiable risk factor for non-communicable diseases globally. High-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) are both widely prescribed exercise modalities, yet comparative evidence regarding their relative efficacy across cardiorespiratory, morphological, and psychological domains in sedentary young adults remains inconclusive. Objective: This study aimed to compare the effects of an 8-week HIIT protocol against an isocaloric MICT program on maximal oxygen uptake (VO₂max), body composition parameters, and psychological well-being in physically inactive university students. Methods: A randomized controlled trial (RCT) was conducted with 72 sedentary participants (age: 21.4 ± 2.1 years; 38 females, 34 males) randomly assigned to HIIT (n = 24), MICT (n = 24), or a control group (n = 24). Both training groups exercised three sessions per week for eight weeks. VO₂max was assessed via the 20-metre shuttle run test, body composition was evaluated through dual-energy X-ray absorptiometry (DEXA), and psychological well-being was measured using the validated Warwick-Edinburgh Mental Well-Being Scale (WEMWBS). Results: HIIT produced significantly greater improvements in VO₂max (Δ = 5.3 mL·kg⁻¹·min⁻¹, p < 0.001, d = 0.91) and reduced visceral fat area compared to MICT, while both training groups demonstrated comparable reductions in body fat percentage and enhanced well-being scores relative to the control group. No serious adverse events were recorded. Conclusion: HIIT represents a time-efficient and effective exercise modality for improving cardiorespiratory fitness in sedentary young adults, with additional metabolic advantages over MICT, although both modalities confer meaningful psychological benefits. These findings have direct implications for physical education curricula and university health promotion programs.
Keywords: high-intensity interval training; cardiorespiratory fitness; body composition; psychological well-being; sedentary behavior; VO₂max; exercise science
Creation-Date: 2026-05-01
Journal: Synoptic: International Journal of Multidisciplinary Research
Volume: 2
Issue: 1
Pages: 31-43
File-URL: https://lmhqneinkzpxfhahvcvx.supabase.co/storage/v1/object/public/pdfs/articles/1780381547807-31-43.pdf
File-Format: Application/pdf
Handle: RePEc:snp:journl:art-1780381549457