Graduate Program in Health Promotion, University of Santa Cruz do Sul, Santa Cruz do Sul, Brasil.
School of Physical Education, Physiotherapy and Dance, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
Paediatr Int Child Health. 2021 May;41(2):93-102. doi: 10.1080/20469047.2020.1838758. Epub 2020 Oct 28.
There is a lack of clarity as to which obesity parameters may be more important in the association between cardiorespiratory fitness (CRF) and cardiometabolic risk factors (CMRF).
To verify the mediating role of different obesity parameters on the association between CRF and CMRF in normal weight and overweight/obese children and adolescents.
This cross-sectional study comprised 999 children and adolescents (534 boys) aged 7-14 years from the south of Brazil. Body mass index (BMI), waist circumference (WC), waist-to-height ratio (WHtR) and percentage of body fat were assessed. Participants were classified as normal weight, overweight and obese according to BMI. CRF was evaluated by the 6-minute run/walk test. . A continuous CMRF score was calculated by summing the Z-scores of the following variables: systolic and diastolic blood pressure, glucose, total cholesterol, high-density lipoprotein cholesterol and triglycerides. Data analysis was performed using partial correlation and linear regression models.
BMI, WC, WHtR and percentage of body fat mediated the relationship between CRF and CMRF in overweight/obese boys and girls but not those of normal weight. Additionally, the percentage of the influence of each obesity parameter was 20% for BMI and WC, 16% for percentage of body fat and 18% for WHtR in girls. For boys, the mediation effect was 25% for BMI, 26% for WC, 28% for percentage of body fat and 25% for WHtR.
Adiposity plays a central role in CMRF; therefore, maintaining an adequate weight status should be an important objective of health-promoting programmes in early age.
: CMRF, cardiometabolic risk factors; CRF, cardiorespiratory fitness; BMI. body mass index; HDL-c, high-density lipoprotein cholesterol, PROCESS PROESP-Br, Projeto Esporte Brasil; SPSS, Package for Social Sciences; TC, total cholesterol; TG, triglycerides; WC, waist circumference; WHtR, waist-to-height ratio; %BF, percentage of body fat.
心肺适能（CRF）与心血管代谢风险因素（CMRF）之间的关联中，哪些肥胖参数更为重要尚不清楚。
验证不同肥胖参数在正常体重和超重/肥胖儿童和青少年的 CRF 与 CMRF 之间的关联中的中介作用。
本横断面研究共纳入 999 名来自巴西南部的 7-14 岁儿童和青少年（男 534 名）。评估了体重指数（BMI）、腰围（WC）、腰高比（WHtR）和体脂百分比。参与者根据 BMI 分为正常体重、超重和肥胖。CRF 通过 6 分钟跑步/步行测试评估。通过对以下变量的 Z 分数求和计算连续 CMRF 评分：收缩压和舒张压、血糖、总胆固醇、高密度脂蛋白胆固醇和甘油三酯。使用偏相关和线性回归模型进行数据分析。
在超重/肥胖的男孩和女孩中，BMI、WC、WHtR 和体脂百分比介导了 CRF 与 CMRF 之间的关系，但在正常体重的儿童中则不然。此外，BMI 和 WC 对每个肥胖参数影响的百分比为 20%，体脂百分比为 16%，WHtR 为 18%。对于男孩，BMI 的中介作用为 25%，WC 为 26%，体脂百分比为 28%，WHtR 为 25%。
肥胖在 CMRF 中起核心作用；因此，在儿童早期保持适当的体重状态应该是促进健康计划的一个重要目标。
