We know that metabolism – The rate at which you burn calories to keep you moving – changes with age, but little is known about the timeline of these changes.
Now, a new study investigating cross-generational metabolism has come up with some fairly surprising discoveries.
Researchers were able to capture vast amounts of data from 6,421 people in 29 countries in the age range of 8 days to 95 years. Researchers used isotopes tracked in urine in drinking water to calculate the daily energy expenditure of each participant.
Contrary to popular belief, our metabolic rate peaks in infants. Therefore, when we are teenagers, we only burn calories slightly faster than when we are middle-aged.
In other words, not all middle-aged-related thick waistlines are down to a slow metabolic rate.
“There are many physiological changes that accompany growth and aging.” Evolution anthropologist Herman Pontzer says, From Duke University. “Think of puberty, menopause, and other stages of life. Curiously, the timing of our” metabolic life stages “does not seem to match those typical milestones. “
As young people, our metabolism seems to be about 3% slower until our twenties. As they level off, the data show – there is no real surge beyond puberty. Between the 20s and 50s, it’s the time when our metabolic rate seems to be the most stable.
When we reach our 60s, researchers have found that our metabolism appears to slow down by about 0.7 percent a year. By the time a person reaches his 90s, on average, he needs 26% less calories per day for energy than a middle-aged person. Not only is there less muscle mass, but the cells are slowing down.
But the real change in energy needs is during the first 12 months of life. A one-year-old child burns calories about 50% faster than an adult. According to Pontzer, energy usage has “rapidly increased” in these early months, even though it controls the rapid increase in weight.
“Something is happening inside the baby’s cells that makes the baby more active, but I still don’t know what those processes are.” Pontzer says..
The use of isotope water technology known as the “double labeled water” method is important. This means that scientists were able to measure all the energy they burn in a day, not just the essential calories needed to stay alive, which other studies have focused on.
How this study tells us because the analytical method is very thorough and the samples are very large and wide. Metabolic changes Apart from all the other ways our bodies evolve as we grow older. We still don’t understand all the changes, but at least now we can see them more clearly.
Another way the findings may be useful is to tailor health treatments to specific people and specific age ranges, taking into account metabolic changes. With more research, you should be able to know exactly what is happening.
“All this concludes that the work that cells do, tissue metabolism, is changing over the course of life in a way that was not well understood.” Pontzer says..
“To answer these questions, we really need a big data set like this.”
The study is published at Chemistry..
Huge research has found that our metabolism changes with age, but that’s not the time you think
Source link Huge research has found that our metabolism changes with age, but that’s not the time you think