Dose-response relationship between daily steps counts and fat loss in obese children and adolescents

CHEN Zekai; ZHU Lin; LI Zhanquan

doi:10.16835/j.cnki.1000-9817.2022.09.012

Volume 43 Issue 9

Sep. 2022

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CHEN Zekai, ZHU Lin, LI Zhanquan. Dose-response relationship between daily steps counts and fat loss in obese children and adolescents[J]. CHINESE JOURNAL OF SCHOOL HEALTH, 2022, 43(9): 1329-1332. doi: 10.16835/j.cnki.1000-9817.2022.09.012

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CHEN Zekai, ZHU Lin, LI Zhanquan. Dose-response relationship between daily steps counts and fat loss in obese children and adolescents[J]. CHINESE JOURNAL OF SCHOOL HEALTH, 2022, 43(9): 1329-1332. doi: 10.16835/j.cnki.1000-9817.2022.09.012

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Dose-response relationship between daily steps counts and fat loss in obese children and adolescents

doi: 10.16835/j.cnki.1000-9817.2022.09.012

1.
Graduate Department of Guangzhou Sport University, Guangzhou (510500), China

Received Date: 2022-05-01
Rev Recd Date: 2022-06-20

Available Online: 2022-09-23

Publish Date: 2022-09-25

Abstract

Abstract

Objective To investigate whether there is a nonlinear relationship and threshold effect between the number of daily steps counts and fat loss in obese children and adolescents. Methods Forty-eight obese children and adolescents were randomly recruited to undergo 4-week closed exercise training during July to August 2021. Actigraphy GT3X+ was used to monitor the daily steps, and fat loss effect was evaluated by changes of body composition indicators before and after the intervention. Paired samples t test was used to compare the indicators before and after the intervention; the dose-response relationship between daily steps counts and fat loss was analyzed by linear regression and piecewise regression, and the nonlinear relationship was analyzed by restricted cubic spline (RCS). Results Body fat mass, percentage of body fat, lean body mass and skeletal muscle mass decreased (27.50±7.33)kg, (36.17±5.59)%, (47.55±6.48)kg, (26.14±3.84)kg, respectively compared with those before intervention (t=21.04, 13.32, 7.65, 8.35, P < 0.05). There was a significant nonlinear dose-response relationship between daily steps counts and the change of these indicators (P < 0.05). After adjusting for age, sex and baseline BMI, each 1 000-step increase in daily walking number, BMI increased by 0.44(95%CI=0.03-0.84)kg and body fat percentage by 0.61%(95%CI=0.17%-1.04%). After adjusting for age, sex, and baseline BMI, each 1 000 step increased in daily number of steps occurred when the daily number of steps ranged from 8 300 to 11 400, lean body weight increased by 0.58(95%CI=0.11-1.04)kg, skeletal muscle mass increased by 0.29(95%CI=0.03-0.54)kg. Conclusion There is a non-linear dose-response relationship between daily steps and fat loss in obese children and adolescents, for optimal fat loss efficiency, daily steps to 8 300-11 400 appropriate.
- Obesity,
- Walking,
- Adipose tissue,
- Intervention studies,
- Child,
- Adolescent

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