Cardiovascular and Pulmonary Branch, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
Nutrition Department, Clinical Center, National Institutes of Health, Bethesda, MD, USA.
Nutr Diabetes. 2013 Dec 23;3(12):e98. doi: 10.1038/nutd.2013.39.
Obesity in the United States is highly prevalent, approaching 60% for black women. We investigated whether nutrition education sessions at the work place added to internet-based wellness information and exercise resources would facilitate weight and fat mass loss in a racially diverse population of overweight female employees.
A total of 199 (average body mass index 33.9±6.3 kg m(-2)) nondiabetic women (57% black) at our institution were randomized to a 6-month program of either internet-based wellness information (WI) combined with dietitian-led nutrition education group sessions (GS) weekly for 3 months and then monthly with shift in emphasis to weight loss maintenance (n=99) or to WI alone (n=100). All were given access to exercise rooms convenient to their work site. Fat mass was measured by dual-energy X-ray absorptiometry.
WI+GS subjects lost more weight than WI subjects at 3 months (-2.2±2.8 vs -1.0±3.0 kg, P>0.001). Weight (-2.7±3.9 vs -2.0±3.9 kg) and fat mass (-2.2±3.1 vs -1.7±3.7 kg) loss at 6 months was significant for WI+GS and WI groups (both P<0.001), but without significant difference between groups (both P>0.10); 27% of the WI+GS group achieved 5% loss of initial weight as did 18% of the WI group (P=0.180). Blacks and whites similarly completed the study (67 vs 74%, P=0.303), lost weight (-1.8±3.4 vs -3.3±5.2 kg, P=0.255) and fat mass (-1.6±2.7 vs -2.5±4.3 kg, P=0.532), and achieved 5% loss of initial weight (21 vs 32%, P=0.189), irrespective of group assignment.
Overweight women provided with internet-based wellness information and exercise resources at the work site lost weight and fat mass, with similar achievement by black and white women. Additional weight loss benefit of nutrition education sessions, apparent at 3 months, was lost by 6 months and may require special emphasis on subjects who fail to achieve weight loss goals to show continued value.
美国肥胖症的发病率极高，黑人女性接近 60%。我们研究了在工作场所进行营养教育课程是否会与基于互联网的健康信息和锻炼资源相结合，以促进不同种族的超重女性员工的体重和脂肪量减少。
我们机构共有 199 名（平均身体质量指数为 33.9±6.3kg/m²）非糖尿病女性（57%为黑人）参与了研究，将她们随机分为 6 个月的方案：接受基于互联网的健康信息（WI）与营养师主导的营养教育小组课程（GS）结合的组（n=99），前 3 个月每周一次，之后每月一次，重点转移到体重维持上；或单独接受 WI 组（n=100）。所有参与者都可以使用工作场所附近的健身房。通过双能 X 射线吸收法测量脂肪量。
WI+GS 组比 WI 组在 3 个月时体重下降更多（-2.2±2.8 比-1.0±3.0kg，P>0.001）。WI+GS 组和 WI 组在 6 个月时体重（-2.7±3.9 比-2.0±3.9kg）和脂肪量（-2.2±3.1 比-1.7±3.7kg）都显著下降（均 P<0.001），但两组之间没有显著差异（均 P>0.10）；WI+GS 组有 27%的人达到了初始体重的 5%降幅，而 WI 组有 18%的人达到了这一降幅（P=0.180）。黑人和白人同样完成了研究（67%比 74%，P=0.303），体重（-1.8±3.4 比-3.3±5.2kg，P=0.255）和脂肪量（-1.6±2.7 比-2.5±4.3kg，P=0.532）均有下降，且达到了初始体重的 5%降幅（21%比 32%，P=0.189），而与分组无关。
在工作场所提供基于互联网的健康信息和锻炼资源的超重女性体重和脂肪量下降，黑人和白人女性的结果相似。3 个月时出现的营养教育课程的额外减重效果在 6 个月时消失，可能需要特别关注未能达到减重目标的受试者，以显示持续的价值。
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