Researchers found that metabolism peaks around age 1, when babies burn calories 50 percent faster than adults, and then gradually declines roughly 3 percent a year until around age 20.
Your metabolic rate does change during your early life, but it plateaus between the ages of 20 and 60, and only decreases by around 1% per year after that. Your total daily energy expenditure also depends on your weight.
Metabolism drops starting at age 10
The research found that 15-year-olds burn 400 to 500 fewer calories while at rest per day compared to when they were 10-years-old – a drop of 25 per cent. But by the age of 16, their calorie expenditure begins to climb again.
Men who are active (doing more than three miles a day) see their calorie need peaks around the age of 18 or 19 at 3,200 calories. The metabolism slows slightly at this age, with drops of 200 calories throughout their 20s and into their mid 30s when it drops again by 200 calories.
That is, metabolic rate is thought to be inversely proportional to maximum lifespan, which means that species that live fast will die young while those that have a slower metabolic rate live slower and longer.
Slow metabolic rate contributes to slow pace of aging.
Metabolic rate remains stable all through adult life, from age 20 to 60 years old.
AGE DECLINE is a medical condition of Body Chemistry that begins decline shortly after you 40s. But by the time you hit 60 many of your immunities and body helpers are nearly gone.
Your metabolism actually begins to slow down after you hit the mark of 60. It declines at the rate of 1 per cent per year till you reach 90. By the time a person reaches the age of 90, they burn about 25 per cent fewer calories than what they used to do in their midlife.
A slow metabolism has many symptoms, and you're likely to have one if you find it difficult to lose weight and easy to gain weight. Other symptoms include fatigue, poor digestion, constipation, low mood, and a colder than average body temperature. All of these are caused by the lower production of energy and heat.
Children's metabolic rates stay high until age 5, but the rate slowly begins to glide down until it plateaus around age 20. Interestingly, adult rates are stable until age 60, when they begin to decline. After age 90, humans use about 26% less energy daily, Pontzer says.
During Puberty
"Your resting metabolic rate (RMR) increases mostly because this is when girls experience a big growth spurt," says Mary Ellen Pavone, M.D., assistant professor of obstetrics and gynecology at Northwestern University's Feinberg School of Medicine.
People with more muscle mass often have faster metabolisms that burn more calories. Age: You lose muscle as you get older, which slows down the metabolism. Sex: Males tend to have faster metabolisms than females. They have more muscle mass, larger bones and less body fat.
Kids actually tend to grow a bit faster in the spring than during other times of the year! A major growth spurt happens at the time of puberty, usually between 8 to 13 years of age in girls and 10 to 15 years in boys. Puberty lasts about 2 to 5 years.
Runners at any age can get speedier by adding intensity to their training—with care.
Epidemiologists have observed that the average person typically puts on 1 to 2 pounds a year from early adulthood through middle age. The CDC's numbers show that much of the increase is concentrated in the 20s, for men and women.
Your Metabolism Is Slower Than Before
Having more fat and less muscle reduces calorie burning. Many people also become less active with age for various reasons, which further slows the number of calories you burn.
Cardiovascular exercise (running, swimming, aerobics, walking) stimulates your metabolism, helps you burn calories and can even temporarily suppress your appetite post-workout.