The notion that it becomes harder to shift weight as you age has been touted as gospel for decades. But a new study has debunked those claims, showing that metabolism stays steady between the ages of 20 and 60.
The study, published on Thursday in the journal Science, looked at data taken from 6,421 participants over a period of 40 years, to see how factors including size, gender and age affected metabolism.
More than 80 researchers from different labs studied the data, which was gathered using a technique called “doubly labelled water tests”, to see how much carbon dioxide a person produces, which helps to gauge energy expenditure.
The method involves participants drinking water in which some of the hydrogen and oxygen are replaced with isotopes of these elements, which can then be traced in urine samples.
Participants came from 29 different countries, and were aged from eight days to 95 years.
The findings showed that while age does play a role in how fast people burn calories, it doesn’t have as much of an impact on metabolism as previously thought.
“Metabolic rate is really stable all through adult life, 20 to 60 years old,” study author Herman Pontzer, an associate professor of evolutionary anthropology at Duke University in the US, told NBC News. “There's no effect of menopause that we can see, for example. And, you know, people will say, 'Well when I hit 30 years old, my metabolism fell apart.' We don't see any evidence for that, actually.”
The researchers found that total daily energy expenditure and “basal expenditure” – the energy needed to carry out fundamental metabolic functions such as breathing – rose with body size.
Taking this into account, they concluded that infants up to one month old used about the same total amount of energy per day as adults, but at about one year of age, this rose rapidly to about 50 per cent higher than adults.
However, after that age, researchers found that total daily energy expenditure declines slowly through childhood and adolescence at a rate of about -2.8 per cent, until adult levels are reached at the age of 20.
From the age of 20, researchers found that total daily energy expenditure plateaus until about the age of 60, when it then starts to decline once more.
Factors including pregnancy and menopause had no effect on metabolic rate, the study concluded.
Researchers concluded that children are likely to be more active than adults, leading to a higher metabolism. However, teenagers, despite stereotypes of them eating more during their “growing years”, did not have significantly higher metabolic rates than adults.
“Previously there was a suggestion that metabolism might slow in your 30s and that was then thought to [cause] susceptibility to middle-age spread,” another of the study’s authors, Professor John Speakman from the University of Aberdeen in the UK, told The Guardian. “We found no evidence to support that. So if you are piling the weight [on] and your waistline is expanding during your 30s and 40s, it’s probably because you are eating more food, then expending less energy.”
EPL's youngest
- Ethan Nwaneri (Arsenal)
15 years, 181 days old - Max Dowman (Arsenal)
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15 years, 271 days old - Harvey Elliott (Fulham)
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The five pillars of Islam
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Key facilities
- Olympic-size swimming pool with a split bulkhead for multi-use configurations, including water polo and 50m/25m training lanes
- Premier League-standard football pitch
- 400m Olympic running track
- NBA-spec basketball court with auditorium
- 600-seat auditorium
- Spaces for historical and cultural exploration
- An elevated football field that doubles as a helipad
- Specialist robotics and science laboratories
- AR and VR-enabled learning centres
- Disruption Lab and Research Centre for developing entrepreneurial skills
The specs
Engine: Dual 180kW and 300kW front and rear motors
Power: 480kW
Torque: 850Nm
Transmission: Single-speed automatic
Price: From Dh359,900 ($98,000)
On sale: Now
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Tom Fletcher: How statecraft and summitry will have to adapt
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Gillian Duncan: Progress is slow for women in field of diplomacy
THREE
Destroyer
Director: Karyn Kusama
Cast: Nicole Kidman, Toby Kebbell, Sebastian Stan
Rating: 3/5
UAE release: January 31
Killing of Qassem Suleimani
National Editorial: Suleimani has been killed, now we must de-escalate
Mina Al Oraibi: Air strike casts a long shadow over the decade ahead
Jack Moore: Why the assassination is such a monumental gamble
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Specs
New schools in Dubai
COMPANY%20PROFILE
While you're here
Kareem Shaheen: Even a pandemic could not unite today's America
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Director: Laxman Utekar
Cast: Vicky Kaushal, Akshaye Khanna, Diana Penty, Vineet Kumar Singh, Rashmika Mandanna
Rating: 1/5
RESULTS
6.30pm Handicap (TB) US$65,000 (Dirt) 1,400m
Winner Golden Goal, Pat Dobbs (jockey), Doug Watson (trainer)
7.05pm Dubai Racing Club Classic Listed Handicap (TB) $88,000 (Turf) 2,410m
Winner: Walton Street, William Buick, Charlie Appleby.
7.40pm Dubai Stakes Group 3 (TB) $130,000 (D) 1,200m
Winner Switzerland, Tadhg O’Shea, Satish Seemar
8.15pm Singspiel Stakes Group 3 (TB) $163,000 (T) 1,800m
Winner Lord Giltters, Adrie de Vries, David O’Meara
8.50pm Al Maktoum Challenge Round-1 (TB) $228,000 (D) 1,600m
Winner Military Law, Antonio Fresu, Musabah Al Muhairi.
9.25pm Al Fahidi Fort Group 2 (TB) $163,000 (T) 1,400m
Winner Land Of Legends, Frankie Dettori, Saeed bin Suroor
10pm Dubai Dash Listed Handicap (TB) $88,000 (T) 1,000m
Winner Equilateral, Frankie Dettori, Charles Hills.
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GRAN%20TURISMO
pakistan Test squad
Azhar Ali (capt), Shan Masood, Abid Ali, Imam-ul-Haq, Asad Shafiq, Babar Azam, Fawad Alam, Haris Sohail, Imran Khan, Kashif Bhatti, Mohammad Rizwan (wk), Naseem Shah, Shaheen Shah Afridi, Mohammad Abbas, Yasir Shah, Usman Shinwari
The specs
- Engine: 3.9-litre twin-turbo V8
- Power: 640hp
- Torque: 760nm
- On sale: 2026
- Price: Not announced yet
Results
(trainer)
1,800m
1,400m
Omar Yabroudi's factfile
Born: October 20, 1989, Sharjah
Education: Bachelor of Science and Football, Liverpool John Moores University
2010: Accrington Stanley FC, internship
2010-2012: Crystal Palace, performance analyst with U-18 academy
2012-2015: Barnet FC, first-team performance analyst/head of recruitment
2015-2017: Nottingham Forest, head of recruitment
2018-present: Crystal Palace, player recruitment manager
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Killing of Qassem Suleimani
National Editorial: Suleimani has been killed, now we must de-escalate
Jack Moore: Why the assassination is such a monumental gamble
Matthew Levitt: Iran retains its ability to launch terror attacks
Damien McElroy: A CEO tasked with spreading Iran's influence
Hussein Ibish: Trump's order on solid constitutional ground
Simon Waldman: Cautious Israel keeping a low profile
Killing of Qassem Suleimani
Mina Al Oraibi: Air strike casts a long shadow over the decade ahead
Jack Moore: Why the assassination is such a monumental gamble
Matthew Levitt: Iran retains its ability to launch terror attacks
Damien McElroy: A CEO tasked with spreading Iran's influence
Hussein Ibish: Trump's order on solid constitutional ground
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Results
5pm Maiden (PA) Dh80,000 1,400m
Winner No Riesgo Al Maury, Szczepan Mazur (jockey), Ibrahim Al Hadhrami (trainer)
5.30pm Handicap (PA) Dh80,000 1,600m
Winner Marwa W’Rsan, Sam Hitchcott, Jaci Wickham.
6pm Handicap (PA) Dh80,000 1,600m
Winner Dahess D’Arabie, Al Moatasem Al Balushi, Helal Al Alawi.
6.30pm Handicap (PA) Dh80,000 2,200m
Winner Safin Al Reef, Connor Beasley, Abdallah Al Hammadi.
7pm Wathba Stallions Cup Handicap (PA) Dh70,000 2,200m
Winner Thulbaseera Al Jasra, Shakir Al Balushi, Ibrahim Al Hadhrami.
7.30pm Maiden (TB) Dh 80,000 2,200m
Winner Autumn Pride, Szczepan Mazur, Helal Al Alawi.
Everton%20Fixtures
On Women's Day
Dr Nawal Al-Hosany: Why more women should be on the frontlines of climate action
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Justin Thomas: Challenge the notion that 'men are from Mars, women are from Venus'
On Women's Day
Dr Nawal Al-Hosany: Why more women should be on the frontlines of climate action
Shelina Janmohamed: Why shouldn't a spouse be compensated fairly for housework?
Justin Thomas: Challenge the notion that 'men are from Mars, women are from Venus'
The National Editorial: Is there much to celebrate on International Women's Day 2021?
How England have scored their set-piece goals in Russia
Three Penalties
v Panama, Group Stage (Harry Kane)
v Panama, Group Stage (Kane)
v Colombia, Last 16 (Kane)
Four Corners
v Tunisia, Group Stage (Kane, via John Stones header, from Ashley Young corner)
v Tunisia, Group Stage (Kane, via Harry Maguire header, from Kieran Trippier corner)
v Panama, Group Stage (Stones, header, from Trippier corner)
v Sweden, Quarter-Final (Maguire, header, from Young corner)
One Free-Kick
v Panama, Group Stage (Stones, via Jordan Henderson, Kane header, and Raheem Sterling, from Tripper free-kick)
What sanctions would be reimposed?
Under ‘snapback’, measures imposed on Iran by the UN Security Council in six resolutions would be restored, including:
- An arms embargo
- A ban on uranium enrichment and reprocessing
- A ban on launches and other activities with ballistic missiles capable of delivering nuclear weapons, as well as ballistic missile technology transfer and technical assistance
- A targeted global asset freeze and travel ban on Iranian individuals and entities
- Authorisation for countries to inspect Iran Air Cargo and Islamic Republic of Iran Shipping Lines cargoes for banned goods
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Artist: Linkin Park
Label: Warner Records
Number of tracks: 11
Rating: 4/5
What the law says
Micro-retirement is not a recognised concept or employment status under Federal Decree Law No. 33 of 2021 on the Regulation of Labour Relations (as amended) (UAE Labour Law). As such, it reflects a voluntary work-life balance practice, rather than a recognised legal employment category, according to Dilini Loku, senior associate for law firm Gateley Middle East.
“Some companies may offer formal sabbatical policies or career break programmes; however, beyond such arrangements, there is no automatic right or statutory entitlement to extended breaks,” she explains.
“Any leave taken beyond statutory entitlements, such as annual leave, is typically regarded as unpaid leave in accordance with Article 33 of the UAE Labour Law. While employees may legally take unpaid leave, such requests are subject to the employer’s discretion and require approval.”
If an employee resigns to pursue micro-retirement, the employment contract is terminated, and the employer is under no legal obligation to rehire the employee in the future unless specific contractual agreements are in place (such as return-to-work arrangements), which are generally uncommon, Ms Loku adds.
On Women's Day
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Justin Thomas: Challenge the notion that 'men are from Mars, women are from Venus'
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GAC GS8 Specs
Engine: 2.0-litre 4cyl turbo
Power: 248hp at 5,200rpm
Torque: 400Nm at 1,750-4,000rpm
Transmission: 8-speed auto
Fuel consumption: 9.1L/100km
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Price: From Dh149,900
COMPANY PROFILE
A list of the animal rescue organisations in the UAE
Looking for a new family pet? Here are the links to visit when it comes to adopting...
Arabian Saluki Center of Dubai (Ascod)
Emirates Animal Welfare Society
Rescue Animals in Need United Arab Emirates
Sniff - Strays Needing Interim of Furever Friends
PARA UAE - Protection of Animal Rights Association
Our coronavirus coverage
Gillian Duncan: What we know so far and what comes next?
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National Editorial: China deserves the whole world's support
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Kareem Shaheen on Canada
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Article 15
Produced by: Carnival Cinemas, Zee Studios
Directed by: Anubhav Sinha
Starring: Ayushmann Khurrana, Kumud Mishra, Manoj Pahwa, Sayani Gupta, Zeeshan Ayyub
Our rating: 4/5
The%20Mother%20
Safety 'top priority' for rival hyperloop company
The chief operating officer of Hyperloop Transportation Technologies, Andres de Leon, said his company's hyperloop technology is “ready” and safe.
He said the company prioritised safety throughout its development and, last year, Munich Re, one of the world's largest reinsurance companies, announced it was ready to insure their technology.
“Our levitation, propulsion, and vacuum technology have all been developed [...] over several decades and have been deployed and tested at full scale,” he said in a statement to The National.
“Only once the system has been certified and approved will it move people,” he said.
HyperloopTT has begun designing and engineering processes for its Abu Dhabi projects and hopes to break ground soon.
With no delivery date yet announced, Mr de Leon said timelines had to be considered carefully, as government approval, permits, and regulations could create necessary delays.
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Gran Gala del Calcio 2019 winners
Best Player: Cristiano Ronaldo (Juventus)
Best Coach: Gian Piero Gasperini (Atalanta)
Best Referee: Gianluca Rocchi
Best Goal: Fabio Quagliarella (Sampdoria vs Napoli)
Best Team: Atalanta
Best XI: Samir Handanovic (Inter); Aleksandar Kolarov (Roma), Giorgio Chiellini (Juventus), Kalidou Koulibaly (Napoli), Joao Cancelo (Juventus*); Miralem Pjanic (Juventus), Josip Ilicic (Atalanta), Nicolo Barella (Cagliari*); Fabio Quagliarella (Sampdoria), Cristiano Ronaldo (Juventus), Duvan Zapata (Atalanta)
Serie B Best Young Player: Sandro Tonali (Brescia)
Best Women’s Goal: Thaisa (Milan vs Juventus)
Best Women’s Player: Manuela Giugliano (Milan)
Best Women’s XI: Laura Giuliani (Milan); Alia Guagni (Fiorentina), Sara Gama (Juventus), Cecilia Salvai (Juventus), Elisa Bartoli (Roma); Aurora Galli (Juventus), Manuela Giugliano (Roma), Valentina Cernoia (Juventus); Valentina Giacinti (Milan), Ilaria Mauro (Fiorentina), Barbara Bonansea (Juventus)
