Dose response relationship between daily steps counts and fat loss in obese children and adolescents
10.16835/j.cnki.1000-9817.2022.09.012
- VernacularTitle:肥胖儿童青少年每日步数与减脂效果的剂量效应关系
- Author:
CHEN Zekai, ZHU Lin, LI Zhanquan
1
Author Information
1. Graduate Department of Guangzhou Sport University, Guangzhou (510500) , China
- Publication Type:期刊文章
- Keywords:
Obesity;
Walking;
Adipose tissue;
Intervention studies;
Child;
Adolescent
- From:
Chinese Journal of School Health
2022;43(9):1329-1332
- CountryChina
- Language:Chinese
-
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[(31.97± 7.82 )kg，(39.06±5.12)%，(49.08±6.93)kg，(27.08±4.15)kg] ( t=21.04, 13.32, 7.65, 8.35, P <0.05). There was a significant nonlinear doseresponse 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.
