Philip N. Ainslie

TL;DR: In this article, the authors analyzed a large, diverse database of total expenditure measured by the doubly labeled water method for males and females aged 8 days to 95 years and found that 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.

TL;DR: In this paper, the authors used the largest dataset compiled on adult TEE and basal energy expenditure (BEE) of people living normal lives to find that energy compensation by a typical human averages 28% due to reduced BEE; this suggests that only 72% of the extra calories we burn from additional activity translates into extra calories burned that day.

TL;DR: In this article, the International Atomic Energy Agency (IAEA) DLW database (5,756 measurements of adults and children) is used to measure total energy expenditure (TEE) in free-living subjects.

TL;DR: In this article, a cross-sectional study of the association between fat-free mass (FFM) and physical activity in relation to age was presented, which indicated that physical activity is a major determinant of body composition as reflected in peak FFM in aging adults.