The arrival of middle age simply cannot be attributed to the decline in metabolism, according to an unprecedented study of the body’s use of energy.
The study, with 6 .95 people, about eight days old up to 95 years, made in 29 countries, suggests that metabolism remains “rock solid” during middle age.
It peaks at one year of age, is stable 2 20 at 60 years electronic then inevitably declines.
Researchers say operating system results bring surprising new electronic discoveries about a body.
Metabolism is every drop on chemistry needed to keep our bodies functioning. Electronic the bigger the body is in terms of developed muscles or a lot of stomach fat the more energy is needed to move it.
Thus, operating system researchers adjusted their measurements, according to a performance body size, to compare the metabolism of these people “kilo by kilo”.
The study, published in Technology magazine, found four phases of a metabolic life:
– Perform birth with 1 year, when a metabolism quits performing at the same level as an electronic mother it reaches a higher point over a lifetime, 29% above an adult population
*)- A mild deceleration occurs on the operating system years over age, with no increase during all seeing that changes from a puberty
– No change 2 to 50 years
– A permanent decline, with falls annuals that, around 2 90 years, leave a metabolism 26% below half-age performance and
“a picture we’ve never seen before electronic they would have many surprises in it,” says David Speakman, a researcher, from a University of Aberdeen, Scotland.
“The most surprising thing to me is that zero they would change during adulthood sony ericsson you’re experiencing some midlife crisis, zero can most blame u a decline in a metabolic rate.”
Other surprises also came from the zero study found.
Zero there was no metabolic increase during puberty or electronic pregnancy. It is a menopause.
The high metabolism in the first years of life also emphasizes how important this moment zero human development electronics because childhood malnutrition can have consequences throughout a lifetime.
“When people talk about metabolism, they think of the electronic diet and exercises, but more carry out than that. In fact, we are watching your body, your cells, in action,” says Professor Herman Pontzer, Duke University (USA), BBC News.
“They are incredibly busy at one year old and, when we see declines with age, we’re seeing your cells about functioning and stopping.”
People’s metabolism was measured using so-called double-labeled water.
Produced from the heavier forms of hydrogen and oxygen atoms that make up water, it can be tracked as it leaves the body.
But double-labeled water is incredibly expensive, so it took researchers working together on 29 countries to collect data on 6.400 people.
Doses of medicines
Researchers claim that a complete understanding of changes in metabolism can have impacts on medicine.
Pontzer says this can help reveal whether cancers spread differently as they the metabolism changes and if the doses d and medications should be adjusted during the different phases.
It is also discussed whether drugs that modify metabolism can delay old age diseases.
Rozalyn Anderson and Timothy Rhoads , from the University of Wisconsin (USA), state that the “unprecedented” study has already brought “important new discoveries about human metabolism”.
And it is “no coincidence” that old age diseases arise at the moment when metabolism decays.
Professor Tom Sanders, from King’s College London, UK, says: “Interestingly, few differences were found in total energy expenditure between early adulthood and middle age, a period when most adults in developed countries gain weight.”
“These findings may support the idea that the obesity epidemic is the result of excess dietary energy intake, not a decline in energy expenditure.”
Soren Brage, University of Cambri dge, also in the UK, claims that the total amount of energy used was “notoriously difficult to measure”.
“We urgently need to turn our attention not just to the global energy crisis defined by the burning of fuels. fossils. But also for the energy crisis that is caused by not burning enough calories in our own bodies.”