Barkin Shari L, Lamichhane Archana P, Banda Jorge A, JaKa Meghan M, Buchowski Maciej S, Evenson Kelly R, Bangdiwala Shrikant I, Pratt Charlotte, French Simone A, Stevens June
Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee.
Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
Am J Prev Med. 2017 Apr;52(4):424-432. doi: 10.1016/j.amepre.2016.11.017. Epub 2017 Jan 9.
In the U.S., children from low-income families are more likely to be obese. The impact of parent modeling of physical activity (PA) and sedentary behaviors in low-income American ethnic minorities is unclear, and studies examining objective measures of preschooler and parent PA are sparse.
This cross-sectional study examined 1,003 parent-child pairs who were of low income, largely Latino and African American, and living in one of two geographically disparate metropolitan areas in the U.S. Parents and children wore GT3X/GT3X+ accelerometers for an average of >12 hours/day (7:00am-9:00pm) for 1 week (September 2012 to May 2014). Analysis occurred in 2015-2016.
About 75% of children were Latino and >10% were African American. Mean child age was 3.9 years. The majority of children (60%) were normal weight (BMI ≥50th and <85th percentiles), and more than a third were overweight/obese. Children's total PA was 6.03 hours/day, with 1.5 hours spent in moderate to vigorous PA (MVPA). Covariate-adjusted models showed a monotonic, positive association between parent and child minutes of sedentary behavior (β=0.10, 95% CI=0.06, 0.15) and light PA (β=0.06; 95% CI=0.03, 0.09). Child and parent MVPA were positively associated up to 40 minutes/day of parent MVPA, but an inverse association was observed when parental MVPA was beyond 40 minutes/day (p=0.002).
Increasing parental PA and reducing sedentary behavior correlate with increased PA-related behaviors in children. However, more work is needed to understand the impact of high levels of parental MVPA on the MVPA levels of their children.
在美国，低收入家庭的儿童更易肥胖。美国低收入少数族裔中，父母体育活动（PA）模式及久坐行为的影响尚不清楚，且针对学龄前儿童和父母PA客观测量的研究较少。
这项横断面研究调查了1003对亲子，他们均为低收入群体，主要是拉丁裔和非裔美国人，居住在美国两个地理位置不同的大都市地区之一。父母和孩子佩戴GT3X/GT3X+加速度计，平均每天佩戴超过12小时（上午7点至晚上9点），持续1周（2012年9月至2014年5月）。分析于2015 - 2016年进行。
约75%的儿童为拉丁裔，超过10%为非裔美国人。儿童平均年龄为3.9岁。大多数儿童（60%）体重正常（BMI≥第50百分位且<第85百分位），超过三分之一超重/肥胖。儿童的总PA为每天6.03小时，其中1.5小时用于中度至剧烈PA（MVPA）。协变量调整模型显示，父母和孩子久坐行为的分钟数之间存在单调正相关（β = 0.10，95%CI = 0.06，0.15），以及轻度PA之间也存在正相关（β = 0.06；95%CI = 0.03，0.09）。儿童和父母的MVPA在父母MVPA每天达40分钟之前呈正相关，但当父母MVPA超过每天40分钟时观察到负相关（p = 0.002）。
增加父母的PA并减少久坐行为与儿童中与PA相关行为的增加相关。然而，需要更多研究来了解高水平父母MVPA对其子女MVPA水平的影响。
