Effects of Television Viewing Reduction on Energy Intake and Expenditure in Overweight and Obese Adults A Randomized Controlled Trial
Effects of Television Viewing Reduction on Energy Intake and Expenditure in Overweight and Obese Adults A Randomized Controlled Trial
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DOI：
10.1001/archinternmed.2009.430
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发表时间：
2009-12-14
影响因子：
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通讯作者：
Harvey-Berino, Jean
中科院分区：
文献类型：
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作者：
Otten, Jennifer J.;Jones, Katherine E.;Harvey-Berino, Jean
背景：成年人平均每天看近5个小时的电视，这与肥胖风险增加有关。这项试验研究了减少看电视对超重和肥胖成年人的能量摄入（EI）、能量消耗（EE）、能量平衡、身体质量指数（BMI）（以体重（公斤）除以身高（米）的平方计算）和睡眠的影响。方法：随机对照试验36名成年人，BMI在25到50之间，自我报告每天至少看3小时电视。从2008年1月到7月，参与者参加了以家庭为基础的协议。在3周的观察期后，根据BMI对参与者进行分层，并随机分为仅观察组（n = 16）或干预组（n = 20），再进行3周。干预措施包括通过电子锁定系统将每个参与者客观测量的基线减少50%的电视观看时间。结果：虽然没有统计学意义，但两组干预组和对照组参与者的El分别降低（-125 kcal/d [95% Cl， -303至52]vs -38 [95% Cl， -265至190]）（P = .52），其中Cl表示置信区间。与对照组（-95 kcal/d [95% Cl， -254至651）相比，干预组显著增加了EE (119 kcal/d [95% Cl， 23至215])（P = 0.02）。干预组各阶段之间的能量平衡为负（-244千卡/天[95% Cl， -459至-30]），对照组为正（57千卡/天[95% Cl， -216至330]）（P = 0.07）。干预组BMI下降幅度更大（-0.25 [95% Cl, -0.45至-0.05]，对照组为-0.06 [95% Cl, -0.43至0.311]）（P = 0.33）。睡眠没有变化。结论：在我们的样本中，减少看电视的时间在干预3周后产生了统计学上显著的情感表达增加，但情感表达没有明显变化。
Background: The average adult watches almost 5 hours of television (TV) per day, an amount associated with increased risks for obesity. This trial examines the effects of TV reduction on energy intake (EI), energy expenditure (EE), energy balance, body mass index (BMI), (calculated as weight in kilograms divided by height in meters squared), and sleep in overweight and obese adults.Methods: Randomized controlled trial of 36 adults with a BMI of 25 to 50 who self-reported a minimum of 3 h/d of TV viewing. Participants were enrolled in home-based protocols from January through July 2008. After a 3-week observation phase, participants were stratified by BMI and randomized to an observation-only control group (n = 16) or an intervention group (n = 20) for 3 additional weeks. The intervention consisted of reducing TV viewing by 50% of each participant's objectively measured baseline enforced by an electronic lock-out system.Results: Although not statistically significant, both groups reduced their El (-125 kcal/d [95% Cl, -303 to 52] vs -38 [95% Cl, -265 to 190]) (P = .52) for intervention and control group participants, respectively, where Cl indicates confidence interval. The intervention group significantly increased EE (119 kcal/d [95% Cl, 23 to 215]) compared with controls (-95 kcal/d [95% Cl, -254 to 651) (P = .02). Energy balance was negative in the intervention group between phases (-244 kcal/d [95% Cl, -459 to -30]) but positive in controls (57 kcal/d [95% Cl, -216 to 330]) (P = .07). The intervention group showed a greater reduction in BMI (-0.25 [95% Cl, -0.45 to -0.05] vs -0.06 [95% Cl, -0.43 to 0.311 in controls) (P = .33). There was no change in sleep.Conclusion: Reducing TV viewing in our sample produced a statistically significant increase in EE but no apparent change in El after 3 weeks of intervention.