Metabolic Flexibility During Exercise in Children with Overweight/Obesity Versus Children who are Lean.

IF 1.4 4区医学 Q3 PEDIATRICS Pediatric Exercise Science Pub Date : 2023-05-01 DOI:10.1123/pes.2021-0229

Brandon Dykstra, Dillon Kuszmaul, Anthony D Mahon

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Abstract

Purpose: This study examined metabolic flexibility with respect to fat metabolism during exercise in children who are lean (n=11; 10.9[0.9] y) and overweight/obese (OW/OB; n=9; 10.3[1.2] y).

Method: Participants were grouped based on body mass index percentiles for age and sex. Groups were mixed in age and sex. Participants completed two 20-minute exercise bouts on a cycle ergometer, separated by a 10-minute rest. Bout 1 consisted of 10 minutes at 50% VO2peak and 10 minutes at 75% VO2peak. Bout 2 was 20 minutes at 50% VO2peak. Absolute fat oxidation rate (FOR), FOR relative to body mass, FOR relative to fat-free mass, and proportional fat use were measured at 10 minutes of bout 1 and 5, 10, 15, and 20 minutes of bout 2.

Results: Absolute FOR was higher in the OW/OB group (range: 117.8 [55.1]-206.2 [48.3] mg·min-1) than in the lean group (81.1 [32.2]-152.2 [38.2] mg·min-1); however, there were no significant main effects for group or significant interactions for proportional fat use, FOR relative to body mass, or FOR relative to fat-free mass.

Conclusion: Children in this age range who are overweight/obese do not display impaired metabolic flexibility with respect to fat metabolism during exercise.

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超重/肥胖儿童与瘦儿童在运动中的代谢灵活性。

目的:本研究考察了瘦弱儿童运动期间脂肪代谢的代谢灵活性(n=11;10.9[0.9] y)和超重/肥胖(OW/OB;n = 9;10.3[1.2] y)。方法:根据年龄和性别的体重指数百分位数对参与者进行分组。这些小组的年龄和性别是混合的。参与者在自行车计力器上完成了两次20分钟的锻炼，中间休息10分钟。第1组为10分钟的50% VO2peak和10分钟的75% VO2peak。第2次是在50% vo2峰值时的20分钟。绝对脂肪氧化率(FOR)，相对于身体质量的FOR，相对于无脂肪质量的FOR，以及比例脂肪使用在第1和第5回合的10分钟，第2回合的10,15和20分钟进行测量。结果:OW/OB组的绝对FOR值(范围:117.8 [55.1]-206.2 [48.3]mg·min-1)高于瘦组(81.1 [32.2]-152.2 [38.2]mg·min-1);然而，在脂肪使用比例、相对于体重或相对于无脂肪质量方面，组间没有显著的主效应或显著的相互作用。结论:这个年龄段超重/肥胖的儿童在运动过程中没有表现出与脂肪代谢有关的代谢灵活性受损。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Pediatric Exercise Science 医学-生理学

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Pediatric Exercise Science is a journal committed to enriching the scientific knowledge of exercise during childhood and adolescence. To this end it publishes information that contributes to an understanding of (a) the unique aspects of the physiologic, physical, biochemical, and psychologic responses of children to exercise, (b) the role of exercise in the treatment of pediatric chronic diseases, (c) the importance of physical activity in the prevention of illness and preservation of wellness, and (d) the means by which participation in sports may be made safer and more enjoyable for children and youth. Consideration will be given for publication of work by various methodologies consistent with the scientific approach. Besides original research, the journal includes review articles, abstracts from other journals, book reviews, and editorial comments. Pediatric Exercise Science encourages the expression of conflicting opinions regarding children and exercise by providing a forum for alternative viewpoints. At the same time it serves as a means of accumulating a base of research information that will allow application of experimental data to clinical practice. The scientific disciplines contributing to this body of knowledge are diverse. Therefore it is the purpose of this journal to provide a common focus for disseminating advances in the science of exercise during childhood. In doing so, the journal allows the opportunity for cross-fertilization of ideas between disciplines that will potentiate the growth of knowledge in this field. Pediatric Exercise Science seeks to stimulate new ideas regarding exercise in children and to increase the awareness of scientists, health care providers, and physical educators of the importance of exercise during childhood.