Metabolism is a term that collectively refers to all the chemical processes in your body. The faster your metabolism, the more calories your body needs. This is the reason some people can eat a lot without gaining weight, while others seem to need less to accumulate fat.
The “speed of metabolism” is commonly known as metabolic rate. It’s the number of calories you burn in a given amount of time, also known as calorie expenditure.
Metabolic rates vary between people, even when they are newborns. In other words, some people are born with a faster metabolism than others.
Although genetics may contribute to these differences, scientists don’t agree on the extent to which they affect metabolic rate, weight gain and obesity Interestingly, most studies show that obese people have a higher total and resting metabolic rate, compared to normal-weight individuals
Researchers have pointed out that this is because obese people have greater amounts of muscle to help support the extra weight . Yet, studies indicate that obese people have higher metabolic rates, irrespective of the amount of muscle mass they have.
In contrast, other studies show that formerly obese people have a 3–8% lower metabolic rate, on average, than those who have never been obese.
One thing is clear — not everyone is created equal when it comes to metabolic rate.
Most of this variation is due to people’s age, as well as their environment and behaviour. However, the role of genetics in these individual differences needs to be studied further.
Summary: Metabolic rates vary by individual, even among infants. However, it is unclear how much of this variation is due to genetics
Take Home Message
Although your basal metabolic rate is largely beyond your control, there are various ways to increase the number of calories you burn as per example from my client John we tweaked his diet,training and mindset to get this look.