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https://science.sciencemag.org/content/373/6556/808
Fat-free mass–adjusted expenditure accelerates rapidly in neonates to ~50%
above adult values at ~1 year; declines slowly to adult levels by ~20 years;
remains stable in adulthood (20 to 60 years), even during pregnancy; then
declines in older adults.

https://reurl.cc/KAGDlq
Writing in the journal Science, Speakman and colleagues report how they
used data from what are known as doubly labelled water studies to
calculate the energy expenditure of 6,421 people across 29 countries, with
data from additional studies involving women who were pregnant or had
recently given birth.
研究人員在科學雜誌上撰文報告了他們如何使用雙標水研究的數據來計算
29個國家6,421人的能量消耗。

The team found total daily energy expenditure and “basal expenditure”, the
energy needed to carry out fundamental metabolic functions such as
breathing, rose with body size. After taking this into account, they found
infants up to one month old used around the same total amount of energy a
day as adults, and that this rose rapidly to about 50% above adult values at
one year of age.

出約50%。

The researchers added that after this time, total daily energy expenditure
declines slowly through childhood and adolescence, at a rate of about
–2.8% a year, to reach adult levels by about 20 years of age. It then
plateaus until about the age of 60, whereupon it begins to decline once
more. Total energy expenditure in adults even remains stable during
pregnancy.
在這段時間之後，兒童和青春期的每日總能量消耗以每年約2.8%的速度緩
慢下降，到20歲時達到成人水平。 然後它達到穩定狀態，直到大約
60歲，然後再次開始下降。 成人的總能量消耗甚至在懷孕期間保持穩定。

個人想法

1. 不能再用年齡當藉口了，除非你小於20歲或大於60歲

2. doubly labelled water
（https://en.wikipedia.org/wiki/Doubly_labeled_water）
這方法應該比單用公式計算每日總能量消耗和“基礎消耗”準確的多

3. 很好奇研究人員如何因應體型及肌肉量的不同而進行調整？

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