PDF(Pubmed)
Abstract：
BACKGROUND: Although inadequate sleep increases the risk of obesity in children, the mechanisms remain unclear. The aims of this study were to assess how sleep loss influenced dietary intake in children while accounting for corresponding changes in sedentary time and physical activity; and to investigate how changes in time use related to dietary intake.
METHODS: A randomized crossover trial in 105 healthy children (8-12 years) with normal sleep (~ 8-11 h/night) compared sleep extension (asked to turn lights off one hour earlier than usual for one week) and sleep restriction (turn lights off one hour later) conditions, separated by a washout week. 24-h time-use behaviors (sleep, wake after sleep onset, physical activity, sedentary time) were assessed using waist-worn actigraphy and dietary intake using two multiple-pass diet recalls during each intervention week. Longitudinal compositional analysis was undertaken with mixed effects regression models using isometric log ratios of time use variables as exposures and dietary variables as outcomes, and participant as a random effect.
RESULTS: Eighty three children (10.2 years, 53% female, 62% healthy weight) had 47.9 (SD 30.1) minutes less sleep during the restriction week but were also awake for 8.5 (21.4) minutes less at night. They spent this extra time awake in the day being more sedentary (+ 31 min) and more active (+ 21 min light physical activity, + 4 min MVPA). After adjusting for all changes in 24-h time use, losing 48 min of sleep was associated with consuming significantly more energy (262 kJ, 95% CI:55,470), all of which was from non-core foods (314 kJ; 43, 638). Increases in sedentary time were related to increased energy intake from non-core foods (177 kJ; 25, 329) whereas increases in MVPA were associated with higher intake from core foods (72 kJ; 7,136). Changes in diet were greater in female participants.
CONCLUSIONS: Loss of sleep was associated with increased energy intake, especially of non-core foods, independent of changes in sedentary time and physical activity. Interventions focusing on improving sleep may be beneficial for improving dietary intake and weight status in children.
BACKGROUND: Australian New Zealand Clinical Trials Registry ANZCTR ACTRN12618001671257, Registered 10th Oct 2018, https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=367587&isReview=true.
METHODS: A randomized crossover trial in 105 healthy children (8-12 years) with normal sleep (~ 8-11 h/night) compared sleep extension (asked to turn lights off one hour earlier than usual for one week) and sleep restriction (turn lights off one hour later) conditions, separated by a washout week. 24-h time-use behaviors (sleep, wake after sleep onset, physical activity, sedentary time) were assessed using waist-worn actigraphy and dietary intake using two multiple-pass diet recalls during each intervention week. Longitudinal compositional analysis was undertaken with mixed effects regression models using isometric log ratios of time use variables as exposures and dietary variables as outcomes, and participant as a random effect.
RESULTS: Eighty three children (10.2 years, 53% female, 62% healthy weight) had 47.9 (SD 30.1) minutes less sleep during the restriction week but were also awake for 8.5 (21.4) minutes less at night. They spent this extra time awake in the day being more sedentary (+ 31 min) and more active (+ 21 min light physical activity, + 4 min MVPA). After adjusting for all changes in 24-h time use, losing 48 min of sleep was associated with consuming significantly more energy (262 kJ, 95% CI:55,470), all of which was from non-core foods (314 kJ; 43, 638). Increases in sedentary time were related to increased energy intake from non-core foods (177 kJ; 25, 329) whereas increases in MVPA were associated with higher intake from core foods (72 kJ; 7,136). Changes in diet were greater in female participants.
CONCLUSIONS: Loss of sleep was associated with increased energy intake, especially of non-core foods, independent of changes in sedentary time and physical activity. Interventions focusing on improving sleep may be beneficial for improving dietary intake and weight status in children.
BACKGROUND: Australian New Zealand Clinical Trials Registry ANZCTR ACTRN12618001671257, Registered 10th Oct 2018, https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=367587&isReview=true.
摘要：
背景：尽管睡眠不足会增加儿童肥胖的风险，机制尚不清楚。这项研究的目的是评估睡眠不足如何影响儿童的饮食摄入，同时考虑久坐时间和体育锻炼的相应变化；并调查时间使用的变化与饮食摄入的关系。
方法：一项随机交叉试验对105名正常睡眠（约8-11小时/晚）的健康儿童（8-12岁）进行了比较，比较了睡眠延长（要求比平时提前一小时关灯一周）和睡眠限制（一小时后关灯）的情况。被冲洗一周分开。24小时时间使用行为(睡眠，入睡后醒来，身体活动,在每个干预周期间，使用腰部佩戴的活动记录和两次多次饮食回顾评估饮食摄入量）。使用混合效应回归模型进行纵向成分分析，使用时间使用变量的等距对数比率作为暴露，饮食变量作为结果。和参与者作为随机效应。
结果：83名儿童（10.2岁，53%女性,62％的健康体重）在限制周期间睡眠减少了47.9（SD30.1）分钟，但晚上也清醒了8.5（21.4）分钟。他们在一天中度过了额外的清醒时间，久坐（31分钟）和更活跃（21分钟轻度体力活动，+4分钟MVPA)。在调整24小时使用时间的所有变化后，失去48分钟的睡眠与消耗明显更多的能量(262kJ，95%CI：55,470），所有这些都来自非核心食品（314kJ；43,638）。久坐时间的增加与非核心食物的能量摄入增加有关（177kJ;25,329），而MVPA的增加与核心食物的摄入增加有关（72kJ;7,136）。女性参与者的饮食变化更大。
结论：睡眠不足与能量摄入增加有关，尤其是非核心食物，独立于久坐时间和身体活动的变化。以改善睡眠为重点的干预措施可能有利于改善儿童的饮食摄入量和体重状况。
背景：澳大利亚新西兰临床试验注册ANZCTRACTRN12618001671257，2018年10月10日注册，https://www。anzctr.org.au/Trial/Registration/TrialReview.aspx?id=367587&isReview=true。
方法：一项随机交叉试验对105名正常睡眠（约8-11小时/晚）的健康儿童（8-12岁）进行了比较，比较了睡眠延长（要求比平时提前一小时关灯一周）和睡眠限制（一小时后关灯）的情况。被冲洗一周分开。24小时时间使用行为(睡眠，入睡后醒来，身体活动,在每个干预周期间，使用腰部佩戴的活动记录和两次多次饮食回顾评估饮食摄入量）。使用混合效应回归模型进行纵向成分分析，使用时间使用变量的等距对数比率作为暴露，饮食变量作为结果。和参与者作为随机效应。
结果：83名儿童（10.2岁，53%女性,62％的健康体重）在限制周期间睡眠减少了47.9（SD30.1）分钟，但晚上也清醒了8.5（21.4）分钟。他们在一天中度过了额外的清醒时间，久坐（31分钟）和更活跃（21分钟轻度体力活动，+4分钟MVPA)。在调整24小时使用时间的所有变化后，失去48分钟的睡眠与消耗明显更多的能量(262kJ，95%CI：55,470），所有这些都来自非核心食品（314kJ；43,638）。久坐时间的增加与非核心食物的能量摄入增加有关（177kJ;25,329），而MVPA的增加与核心食物的摄入增加有关（72kJ;7,136）。女性参与者的饮食变化更大。
结论：睡眠不足与能量摄入增加有关，尤其是非核心食物，独立于久坐时间和身体活动的变化。以改善睡眠为重点的干预措施可能有利于改善儿童的饮食摄入量和体重状况。
背景：澳大利亚新西兰临床试验注册ANZCTRACTRN12618001671257，2018年10月10日注册，https://www。anzctr.org.au/Trial/Registration/TrialReview.aspx?id=367587&isReview=true。
