Stallmann-Jorgensen I S, Gutin B, Hatfield-Laube J L, Humphries M C, Johnson M H, Barbeau P
Department of Pediatrics, Medical College of Georgia, Georgia Prevention Institute, Augusta, GA 30912, USA.
Int J Obes (Lond). 2007 Apr;31(4):622-9. doi: 10.1038/sj.ijo.0803587.
Excess body fat accumulation may begin in youth and is linked with increased risk of cardiovascular disease. Examination of physical activity (PA) and diet behaviours predictive of adiposity may help target efforts to reduce chronic disease risk.
We hypothesized that energy intake (EI) from fat, vigorous PA (VPA), and their interaction would predict body fat percentage (%BF) and visceral adipose tissue (VAT) in youth and that sedentary behaviours and intake of dairy, fruit, vegetable and whole grain foods would be related to adiposity.
A cross-sectional, observational study of reported PA and diet behaviours and objective adiposity measures.
Six-hundred sixty-one healthy black and white adolescents aged 14-18 years.
Diet by 24-h recalls using Nutrition Data Systems for Research (Minneapolis, MN, USA), VPA by previous day physical activity recalls (PAR), and %BF with dual-energy X-ray absorptiometry. VAT by magnetic resonance imaging for 434 subjects.
Reported EI and VPA were positively correlated with each other and were negative predictors of %BF. Time spent watching television or movies and %EI from protein were positive predictors of %BF. Adjusted for EI, none of the independent variables predictive of %BF retained their significance. %BF and VAT were highly correlated (r=0.73, P<0.0001). EI was the sole and negative predictor of VAT.
Higher energy 'throughput', not energy restriction, characterize leaner youths. Youths should be advised to engage in VPA so that they can eat sufficient calories to obtain the nutrients required for optimal health while remaining lean.
过多的体脂积累可能始于青年时期，并与心血管疾病风险增加有关。研究预测肥胖的身体活动（PA）和饮食行为，可能有助于针对性地努力降低慢性病风险。
我们假设来自脂肪的能量摄入（EI）、剧烈身体活动（VPA）及其相互作用可预测青年的体脂百分比（%BF）和内脏脂肪组织（VAT），且久坐行为以及乳制品、水果、蔬菜和全谷物食品的摄入量与肥胖有关。
一项关于报告的PA和饮食行为以及客观肥胖指标的横断面观察性研究。
661名年龄在14 - 18岁的健康黑人和白人青少年。
使用美国明尼阿波利斯市营养数据系统研究软件通过24小时回忆法评估饮食，通过前一天的身体活动回忆法评估VPA，使用双能X线吸收法测量%BF。对434名受试者使用磁共振成像测量VAT。
报告的EI和VPA相互呈正相关，且是%BF的负预测因子。看电视或电影的时间以及蛋白质的%EI是%BF的正预测因子。在调整EI后，预测%BF的自变量均不再具有统计学意义。%BF和VAT高度相关（r = 0.73，P < 0.0001）。EI是VAT的唯一负预测因子。
较瘦的青年的特征是能量“通量”较高，而非能量限制。应建议青年进行VPA，以便他们能摄入足够的热量以获取最佳健康所需的营养，同时保持苗条。
