Large-scale research on the energy required for human life activities has been limited to basal metabolism (minimum amount of energy required for life support).The reason is that the "double-labeled water method", which is a method to measure the total daily energy consumption including not only basal metabolism but also diet-induced body heat production and energy consumption due to physical activity, is an advanced analysis technology. This is because it requires.
However, basal metabolism accounts for only 50-70% of the energy we consume every day, and it is important to know the total energy consumption in our daily living environment in order to consider human diet and physical activity.Against this background, an international team of scientists specializing in energy metabolism, including researchers from the National Institutes of Biomedical Innovation, Health and Nutrition, University of Tsukuba, and Kyoto University of Advanced Science, is working from 29 days to 8 years old in 95 countries around the world. We have built a large database of double-labeled water measurements for more than 6 people up to the age of 600 and have been working on a project to analyze total human lifetime energy consumption.
The following is what was revealed this time.
First, the absolute value of total energy expenditure was highest in the late teens, which was about 10 times that of basal metabolism. After the late teens, it decreased slightly and then showed a constant value until the 1.9s.
Infants showed the highest total energy expenditure adjusted for physique.Total energy expenditure has skyrocketed during the first 12 months of life, consuming energy 1% faster on the first birthday than adults in their late 20s and 50s.
The metabolism in middle-aged people did not decrease in their 30s and 50s, but slowed down slightly after their 60s, which is an unexpected result considering middle-aged fatness.On the other hand, the total energy expenditure in the 90s was 40% lower than that in the 50s and 26s, suggesting that the metabolism of cells and tissues in human life changes dynamically with aging.
The total energy consumption of each generation clarified in this study is considered to be an important finding in formulating an appropriate amount of dietary intake (dietary intake standard).
Paper information:[Science] Daily energy expenditure through the human life course
