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Short-term high-intensity interval training on body composition and blood glucose in overweight and obese young women |
Kong Z, Sun S, Liu M, Shi Q |
Journal of Diabetes Research 2016 Sep 28;(4073618):Epub |
clinical trial |
4/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed* |
This study was to determine the effects of five-week high-intensity interval training (HIIT) on cardiorespiratory fitness, body composition, blood glucose, and relevant systemic hormones when compared to moderate-intensity continuous training (MICT) in overweight and obese young women. METHODS: Eighteen subjects completed 20 sessions of HIIT or MICT for five weeks. HIIT involved 60 x 8s cycling at about 90% of peak oxygen consumption (VO2peak) interspersed with 12s recovery, whereas MICT involved 40-minute continuous cycling at 65% of VO2peak. VO2peak, body composition, blood glucose, and fasting serum hormones, including leptin, growth hormone, testosterone, cortisol, and fibroblast growth factor 21, were measured before and after training. RESULTS: Both exercise groups achieved significant improvements in VO2peak (+7.9% in HIIT versus +11.7% in MICT) and peak power output (+13.8% in HIIT versus +21.9% in MICT) despite no training effects on body composition or the relevant systemic hormones. Blood glucose tended to be decreased after the intervention (p = 0.062). The rating of perceived exertion in MICT was higher than that in HIIT (p = 0.042). CONCLUSION: Compared with MICT, short-term HIIT is more time-efficient and is perceived as being easier for improving cardiorespiratory fitness and fasting blood glucose for overweight and obese young women.
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