Lazzer S, Tringali G, Caccavale M, De Micheli R, Abbruzzese L, Sartorio A
Department of Medical and Biological Sciences, University of Udine, P.le Kolbe 4-33100, Udine, Italy.
School of Sport Science, University of Udine, Udine, Italy.
J Endocrinol Invest. 2017 Feb;40(2):217-226. doi: 10.1007/s40618-016-0551-4. Epub 2016 Sep 17.
To investigate the effects of a 3-week weight-management program entailing moderate energy restriction, nutritional education, psychological counseling and three different exercise training (a: low intensity, LI: 40 % V'Omax; b: high intensity, HI: 70 % V'Omax; c: high-intensity interval training, HIIT), on body composition, energy expenditure and fat oxidation rate in obese adolescents.
Thirty obese adolescents (age: 15-17 years, BMI: 37.5 kg m) participated in this study. Before starting (week 0, W0) and at the end of the weight-management program (week 3, W3), body composition was assessed by an impedancemeter; basal metabolic rate (BMR), energy expenditure and substrate oxidation rate were measured during exercise and post-exercise recovery by indirect calorimetry.
At W3, body mass (BM) and fat mass (FM) decreased significantly in all groups, the decreases being significantly greater in the LI than in the HI and HIIT subgroups (BM: -8.4 ± 1.5 vs -6.3 ± 1.9 vs -4.9 ± 1.3 kg and FM: -4.2 ± 1.9 vs -2.8 ± 1.2 vs -2.3 ± 1.4 kg, p < 0.05, respectively). V'Opeak, expressed in relative values, changed significantly only in the HI and HIIT groups by 0.009 ± 0.005 and 0.007 ± 0.004 L kg FFM min (p < 0.05). Furthermore, the HI and HIIT subgroups exhibited a greater absolute rate of fat oxidation between 50 and 70 % V'Opeak at W3. No significant changes were observed at W3 in BMR, energy expenditure during exercise and post-exercise recovery.
A 3-week weight-management program induced a greater decrease in BM and FM in the LI than in the HI and HIIT subgroups, and greater increase in V'Opeak and fat oxidation rate in the HI and HIIT than in the LI subgroup.
研究一项为期3周的体重管理计划的效果，该计划包括适度的能量限制、营养教育、心理咨询以及三种不同的运动训练（a：低强度，LI：最大摄氧量的40%；b：高强度，HI：最大摄氧量的70%；c：高强度间歇训练，HIIT），对肥胖青少年身体成分、能量消耗和脂肪氧化率的影响。
30名肥胖青少年（年龄：15 - 17岁，BMI：37.5 kg/m²）参与了本研究。在体重管理计划开始前（第0周，W0）和结束时（第3周，W3），通过阻抗仪评估身体成分；通过间接测热法在运动期间和运动后恢复过程中测量基础代谢率（BMR）、能量消耗和底物氧化率。
在W3时，所有组的体重（BM）和脂肪量（FM）均显著下降，LI组的下降幅度显著大于HI组和HIIT亚组（BM：-8.4 ± 1.5 vs -6.3 ± 1.9 vs -4.9 ± 1.3 kg；FM：-4.2 ± 1.9 vs -2.8 ± 1.2 vs -2.3 ± 1.4 kg，p均<0.05）。以相对值表示的峰值摄氧量（V'Opeak）仅在HI组和HIIT组有显著变化，分别增加了0.009 ± 0.005和0.007 ± 0.004 L·kg去脂体重·min（p<0.05）。此外，HI组和HIIT亚组在W3时，在50%至70%V'Opeak之间表现出更高的绝对脂肪氧化率。在W3时，BMR、运动期间和运动后恢复过程中的能量消耗均未观察到显著变化。
为期3周的体重管理计划使LI组的BM和FM下降幅度大于HI组和HIIT亚组，而HI组和HIIT组的V'Opeak和脂肪氧化率的增加幅度大于LI亚组。
