Affective responses during interval training in obese adolescents:A randomized controlled trial
Objective To explore the affective response and dynamic attributes of obese adolescents in high-and moderate-intensity interval training.Methods Between February and July 2023,a total of 42 obese adolescents(Age:12.3±0.5 years,BMI:24.0±1.1 kg/m2)were recruited and randomly divided into a high-intensity interval training group(HIIT),a moderate-intensity interval training group(MIIT),and a non-training control group.Before and after the intervention,all groups were measured and compared their weight,BMI,body composition(body fat percentage and visceral adipose fat),car-diorespiratory fitness(VO2max),and affective response during exercise(affect valence,perceived arousal,rating of perceived exertion),as well as post-exercise enjoyment.Results After the 12-week interven-tion,there were significant decrease in the average BMI,body fat percentage,and visceral adipose tis-sue in the HIIT group(P<0.05),but a significant increase in the average VO2max(P<0.05).Moreover,a-fter the training,the average VO2max of the HIIT group was significantly higher than the MIIT group(P<0.05).Meanwhile,both HIIT and MIIT had a positive effect on emotional valence and post-exercise enjoyment.However,MIIT participants had more positive affect responses than HIIT ones,while the arousal(P<0.01)and physical activity enjoyment scores(P<0.05)in the HIIT group were significantly higher than the MIIT group.Conclusions Interval training is effective in improving body composition and cardiorespiratory fitness of obese adolescents.Higher intensity and arousal are key to the improve-ment.Moreover,the positive affect response and exercise enjoyment after interval training may help them maintain high exercise adherence and play a long-term promoting role.
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