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

Rajapov G'olibbek Oripovich ()
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Rajapov G'olibbek Oripovich: University of Economy and Pedagogy

Synoptic: International Journal of Multidisciplinary Research, vol. 2, issue 1, 31-43

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

Keywords: high-intensity interval training; cardiorespiratory fitness; body composition; psychological well-being; sedentary behavior; VO₂max; exercise science (search for similar items in EconPapers)
Date: 2026-05-01
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