University of Pernambuco.
University of Graz.
Res Q Exerc Sport. 2022 Sep;93(3):578-584. doi: 10.1080/02701367.2021.1878089. Epub 2021 Oct 15.
: To analyze whether body adiposity mediates and/or moderates the association between time in moderate-to-vigorous physical activities (MVPA) and blood pressure in children. : This was a cross-sectional study of 577 children aged 5 to 7 years old. MVPA was measured by accelerometry. Body mass index (BMI), waist circumference (WC), and the sum of tricipital and subscapular skinfolds (skinfolds) assessed children's body adiposity. Systolic (SBP) and diastolic blood pressure (DBP) were used as the dependent variables. : In the primary analysis adjusting for BMI or skinfolds measures, additional time in MVPA was associated with higher SBP. On the other hand, further analyses showed that children in the largest BMI tertile (β:0.18; 95%CI: 0.12-0.24; β:0.11; 95%CI: 0.05-0.17), waist circumference (β:0.16; CI: 0.09-0.22; β:0.08; CI:0.02-0.14), or sum of skinfolds (β:0.18; CI: 0.11-0.24; β:0.09; CI: 0.03-0.16) presented a positive relationship between MVPA and blood pressure whereas no positive association was observed for children in the first and second adiposity tertiles. Adiposity also mediated the association between MVPA and blood pressure. A decrease of 0.03 mmHg in the systolic blood pressure was observed by decreasing the sum of skinfolds for each additional minute per day in MVPA. A decrease in diastolic blood pressure of 0.02 mmHg was observed for each additional minute per day in MVPA, which was related to a negative association between time in MVPA and waist circumference and sum of skinfolds. : Not accounting for the potential moderation and mediation role of adiposity may lead to misinterpretations in the MVPA and blood pressure relationship.
: 分析儿童身体脂肪含量在中等到剧烈体力活动（MVPA）与血压之间的关联中是否起中介作用和/或调节作用。: 这是一项横断面研究，纳入了 577 名 5 至 7 岁的儿童。MVPA 通过加速度计进行测量。身体质量指数（BMI）、腰围（WC）和三头肌和肩胛下皮褶（皮褶）总和评估儿童的体脂含量。收缩压（SBP）和舒张压（DBP）作为因变量。: 在调整 BMI 或皮褶测量值的初步分析中，MVPA 时间的额外增加与 SBP 升高相关。另一方面，进一步的分析表明，在 BMI 最大三分位数（β：0.18；95%CI：0.12-0.24；β：0.11；95%CI：0.05-0.17）、腰围（β：0.16；CI：0.09-0.22；β：0.08；CI：0.02-0.14）或皮褶总和（β：0.18；CI：0.11-0.24；β：0.09；CI：0.03-0.16）较高的儿童中，MVPA 与血压之间存在正相关关系，而在体脂含量处于前两个三分位数的儿童中则没有观察到正相关关系。脂肪含量也介导了 MVPA 与血压之间的关联。在 MVPA 中，每天增加 1 分钟，皮褶总和减少 0.03mmHg，可观察到收缩压降低 0.03mmHg。在 MVPA 中，每天增加 1 分钟，舒张压降低 0.02mmHg，这与 MVPA 时间与腰围和皮褶总和之间的负相关有关。: 如果不考虑脂肪含量在 MVPA 和血压关系中的潜在调节和中介作用，可能会导致对 MVPA 和血压关系的误解。
