Anderson Kara C, Hirsch Katie R, Peterjohn Austin M, Blue Malia N M, Pihoker Alexis A, Ward Dianne S, Ondrak Kristin S, Smith-Ryan Abbie E
Applied Physiology Laboratory, Department of Exercise and Sport Science, The University of North Carolina, Chapel Hill, NC, USA.
Human Movement Science Curriculum, Department of Allied Health Science, University of North Carolina, Chapel Hill, NC, USA.
Int J Adolesc Med Health. 2020 Nov 5;35(1):81-88. doi: 10.1515/ijamh-2020-0240. eCollection 2023 Feb 1.
Normal weight obesity (NWO) describes individuals who have a normal weight body mass index (BMI), but have an unhealthy amount of body fat. Based on the life-long habits that develop during college, exploring NWO among a college-aged population may be essential in identifying and preventing obesity that develops in early adulthood. This study aimed to characterize NWO among young adults with normal weight BMI. 94 college students (Mean ± SD: Age: 19.6 ± 1.5 yrs; BMI: 21.9 ± 1.8 kg/m) enrolled during the Fall semester (Aug-Oct) were assessed for body composition by dual energy X-ray absorptiometry to determine body fat percentage, fat mass, lean mass and trunk fat; lifestyle habits were characterized from validated questionnaires. Mean arterial pressure and metabolic biomarkers [total cholesterol, high density lipoproteins, non-high density lipoproteins, and glucose] were evaluated for cardiometabolic health. NWO was defined using data from the National Health and Nutrition Examination Survey (NHANES) for body fat percentage. Data was analyzed by group (NWO vs NWL) and sex. with independent t-tests to investigate continuous data, and chi-square test of independence for categorical data. Rates of NWO for the total sample were 13.8%. Males (n=30) had a higher rate of NWO (26.7%) compared to females (n=64; 7.8%). NWO individuals had higher fat mass (p=0.024), trunk fat (p<0.001), and larger waist to hip ratio (p<0.001) than normal weight lean. NWO also engaged in less vigorous physical activity (p=0.043). The occurrence of NWO among otherwise healthy college students is evident. Identification of these individuals may be an effective component for obesity prevention and treatment. Determining feasible methods to measure body fat in this population is essential, as BMI may mask obesity in a young adult population.
正常体重肥胖（NWO）指的是那些体重指数（BMI）正常，但体脂含量不健康的个体。鉴于在大学期间养成的终身习惯，在大学生群体中探究正常体重肥胖对于识别和预防成年早期出现的肥胖可能至关重要。本研究旨在描述体重指数正常的年轻成年人中的正常体重肥胖情况。对秋季学期（8月至10月）入学的94名大学生（均值±标准差：年龄：19.6±1.5岁；BMI：21.9±1.8kg/m²）采用双能X线吸收法评估身体成分，以确定体脂百分比、脂肪量、去脂体重和躯干脂肪；通过经过验证的问卷来描述生活方式习惯。评估平均动脉压和代谢生物标志物[总胆固醇、高密度脂蛋白、非高密度脂蛋白和葡萄糖]以了解心脏代谢健康状况。使用来自国家健康与营养检查调查（NHANES）的体脂百分比数据来定义正常体重肥胖。数据按组（正常体重肥胖组与非肥胖正常体重组）和性别进行分析。对于连续数据采用独立t检验进行研究，对于分类数据采用卡方独立性检验。总样本的正常体重肥胖率为13.8%。男性（n = 30）的正常体重肥胖率（26.7%）高于女性（n = 64；7.8%）。与非肥胖正常体重者相比，正常体重肥胖个体的脂肪量更高（p = 0.024）、躯干脂肪更多（p < 0.001）且腰臀比更大（p < 0.001）。正常体重肥胖个体进行的剧烈身体活动也较少（p = 0.043）。在其他方面健康的大学生中，正常体重肥胖的情况很明显。识别这些个体可能是肥胖预防和治疗的一个有效组成部分。确定在该人群中测量体脂的可行方法至关重要，因为BMI可能会掩盖年轻成年人群中的肥胖情况。
