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量化能量失衡对人体体重的影响
Kevin D Hall1, Gary Sacks, Dhruva Chandramohan
1National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA. kevinh@niddk.nih.gov
Lancet (London, England)
|August 30, 2011
概括
一个小而持久的每日能量失衡会导致成年人肥胖. 数学建模表明,体重变化缓慢,较大的脂肪率导致更长的稳定时间和显著的维护能量差距,突出了主要的公共卫生挑战.
科学领域:
- 代谢动态和肥胖研究的研究.
- 人类新陈代谢的数学建模
- 能源平衡和重量变化
背景情况:
- 肥胖干预需要准确预测体重动态,需要考虑能量失衡.
- 成年人体新陈代谢的数学建模可以模拟减肥期间的能量消耗适应.
- 介绍了一个基于网络的模拟器,用于预测重量变化动态.
研究的目的:
- 开发一种数学建模方法来模拟成年人的新陈代谢和减肥期间的能量消耗适应.
- 创建一个基于Web的模拟器来预测重量变化动态.
- 分析美国成年肥胖流行病背后的能量平衡动态.
主要方法:
- 开发成人人类新陈代谢的数学模型.
- 在减肥期间对能源支出调整的模拟.
- 创建一个基于Web的模拟器来预测体重变化.
- 应用人口平均模型来分析肥胖流行病的动态.
主要成果:
- 体重对能量摄入量变化的反应缓慢,半衰期约为1年.
- 具有较大脂肪的个体在相同的能量摄入量变化中经历了更大的体重减轻,并且需要更长的时间才能达到稳定状态体重.
- 持续的每日能量失衡差距约为30kJ,有助于平均体重增加.
- 维持体重增加需要每天大约0.9MJ的显著"维护能量差距",这凸显了扭转肥胖的挑战.
结论:
- 准确预测体重时间过程需要动态能量不平衡建模.
- 数学模型和模拟器为理解和预测体重变化提供了有价值的工具.
- 调查结果量化了导致肥胖流行病的大量能源差距,强调了公共卫生挑战.
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