J Phys Act Health. 2019 Oct 1;16(12):872-879. doi: 10.1123/jpah.2018-0182. Epub 2019 Jul 17.
This study reported compliance with 24-hour physical activity and sedentary behavior guidelines, and associations with adiposity in the first 2 years of life.
Participants (N = 119) were recruited from Soweto, South Africa. Visceral and subcutaneous abdominal adipose tissue was measured by ultrasound. Participation in 2 movement behaviors (physical activity and sedentary time) was reported by mothers. Differences in adiposity between those meeting each individual guideline, as well as the combination of both movement guidelines, compared with those not meeting the guidelines were assessed.
Only 5% of infants met the sedentary guidelines; however, 58% met the physical activity guidelines. Subcutaneous adipose tissue was significantly higher in those meeting the physical activity guideline (0.50 [0.01] vs 0.47 [0.01] cm, P = .03) compared with those not meeting the guideline. Meeting the screen time component of the sedentary guideline was associated with higher visceral adipose tissue (β = 0.96, P < .01), while meeting one guideline compared with meeting none was associated with higher subcutaneous adipose tissue (β = 0.05, P = .01).
Most infants and toddlers from this low- to middle-income setting were not meeting sedentary behavior guidelines. Both behaviors were associated with abdominal adiposity, but not with body mass index z score; implying these movement behaviors may impact abdominal fat deposition rather than body size.
本研究报告了在生命的头 2 年中遵守 24 小时身体活动和久坐行为指南的情况，以及与肥胖的关系。
参与者（N=119）来自南非索韦托。通过超声测量内脏和皮下腹部脂肪组织。母亲报告了 2 种运动行为（身体活动和久坐时间）的参与情况。评估了那些符合每项单独指南的人和符合这两项运动指南的人，与那些不符合指南的人之间在肥胖方面的差异。
只有 5%的婴儿符合久坐指南；然而，有 58%的婴儿符合身体活动指南。与不符合指南的婴儿相比，符合身体活动指南的婴儿的皮下脂肪组织明显更高（0.50 [0.01] 与 0.47 [0.01] cm，P=.03）。符合久坐指南中屏幕时间部分与更高的内脏脂肪组织相关（β=0.96，P<.01），而与不符合任何指南相比，符合一项指南与更高的皮下脂肪组织相关（β=0.05，P=.01）。
来自这个中低收入环境的大多数婴儿和幼儿都不符合久坐行为指南。这两种行为都与腹部肥胖有关，但与体重指数 z 评分无关；这意味着这些运动行为可能会影响腹部脂肪沉积，而不是身体大小。
