Do Fat People Stay Warmer in Cold Weather Than Thin People? | The Weather Channel (2024)

By Allie Goolrick

January 04, 2014

There may be a reason that Santa, who spends most of his time toiling away at his freezing North Pole workshop or traversing the globe in an open-air sled, is a little on the rotund side. A bowl full of jelly may actually help to defend people against cold weather — at least to a certain extent.

It’s not the most politically correct of questions to ponder to be sure, but Popular Science recently shed some light onto whether fat people stay warmer in the cold than thin people, and the answer is both yes and no.

According to Popular Science, studies done on both cold-water swimmers and hospital patients have shown that people with a higher Body Mass Index (BMI) are less susceptible to hypothermia because fat insulates the body’s core.

(MORE: Do You Live in the Fattest State)

That’s not surprising, considering that fat certainly plays an important part of thermal regulation in animals. Whales have a layer of blubber that is vital to insulating them against cold water, while camels, which live in hot climates, hold all of their fat in their humps to avoid all-over insulation, reports Discovery Magazine.

In humans, thermoregulation gets a bit more complicated.

Because of complex signaling in the brain in response to cold weather, people with a higher BMI may in fact have the sense of feeling colder.

Here’s how it all works: When the outside temperature drops, our brains trigger our bodies to respond by interpreting two signals, internal body temperature and the temperature on the surface of the skin. According to Scientific American, when blasted with a winter chill, our blood vessels constrict, limiting our heat loss through the skin, and we start to shiver, which warms us up.

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But in people with a higher BMI, subcutaneous fat effectively insulates the body’s core, while the skin cools. According to Catherine O’Brien, a research physiologist with the U.S. Army Research Institute of Environmental Medicine, a cooler skin temperature may make obese people feel colder in response.

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Of course, subcutaneous fat isn’t the only factor that affects humans’ temperature. If you are relatively fit and seem to "run hot," there’s an explanation for that: Muscle tissue generates heat, offering a different protection from the cold. If you’re relatively petite, not only does a low BMI heighten your response to cold, but so does your overall surface area. According to O’Brien, smaller people lose heat more quickly.

The combination of lower muscle mass and higher surface area in women provides some much-needed insight about the age-old stereotype that the female population is always cold (so next time the lady in your life asks for your jacket, don’t hesitate to hand it over).

But overall, which is better for handling cold weather, being slightly on the hefty side or thinner?

“We have a joke around here that the person who’s best-suited for cold is fit and fat,” O’Brien told PopSci.

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Do Fat People Stay Warmer in Cold Weather Than Thin People? | The Weather Channel (2)

Do Fat People Stay Warmer in Cold Weather Than Thin People? | The Weather Channel (2024)

FAQs

Do Fat People Stay Warmer in Cold Weather Than Thin People? | The Weather Channel? ›

According to Scientific American, when blasted with a winter chill, our blood vessels constrict, limiting our heat loss through the skin, and we start to shiver, which warms us up. But in people with a higher BMI, subcutaneous fat effectively insulates the body's core, while the skin cools.

Do fat people stay warmer in cold weather? ›

Humans with obesity cool less rapidly and have to elevate their metabolism less significantly than lean individuals when immersed in water. Although obesity provides an advantage in cold conditions it conversely impedes heat loss and makes obese people susceptible to heat stress more than lean individuals.

Do skinny people get colder in the winter? ›

Smaller, thinner, people have a large surface area relative to their body mass compared with bigger, more thickset people. This means that they lose heat and feel the cold more easily than those who are chubbier. It's particularly important to remember this when you're out in cold weather with small children.

Are you warmer with more body fat? ›

Fatness was linked to lower heat loss, lower heat production, higher core temperature, lower heat debt, and higher tissue insulation [3].

Do fat people suffer more in hot weather? ›

Being overweight or obese is also a risk factor since excess weight causes the body to retain more heat. "People with liver disease or lung disease are also at higher risk," Selvam said.

Does weight affect body temperature? ›

Thus, the higher temperature observed among obese subjects could be due to several mechanisms. First, obese subjects have a higher resting metabolic rate [9], a feature also observed in this study by the positive association between resting heart rate and body temperature.

Does fat insulate your body? ›

Benefits of Adipose Tissue

Insulation: Adipose tissue helps to insulate your body. This heat insulation keeps your body warm when you are exposed to cold temperatures. 5. Protection: Adipose tissue cushions and protects your organs, bones, and other tissues from damage.

Do skinny people handle heat better? ›

Being overweight or obese, with the extra layer of insulation, can make people less heat tolerant.

Which part of the body gets cold first? ›

Its objective is to maintain the central heat in our body, therefore, when it is cold the first parts of our body that suffer this drop in temperature are the feet and hands. The warm blood levels are maintained in the center and, therefore, the extremities do not have enough blood to be at a high temperature.

How to stay warm as a skinny person? ›

wearing plenty of thin layers rather than one thick one. putting on a coat, hat, scarf, gloves and warm shoes or boots when you go outside. wearing clothes made of wool or fleecy synthetic fibres (cotton is only effective if the garment stays dry) wearing bed socks and thermal underwear at night.

Why does fat keep us warm? ›

Brown fat is responsible for producing heat to warm the blood in your body. You'll notice brown fat burning right before you start to shiver because the fat activates (turns on) in cold temperatures. It produces heat by breaking down blood sugar (glucose) and molecules of fat.

Does eating make you less cold? ›

In general, foods that take longer to digest can help raise your body temperature and make you feel warmer. The medical term for this process is thermogenesis, which is the process of your body producing heat caused by food metabolizing. Look for food that's high in healthy fats, proteins and carbohydrates.

Why am I cold all the time? ›

Some people naturally tend to feel colder than others without any discernible cause. However, cold intolerance can also indicate an underlying medical condition, such as hypothyroidism, anemia, peripheral artery disease, and more.

Does fat protect organs? ›

Adipose tissue also has important mechanical properties, serving to protect delicate organs (the eye, for example, is surrounded by fat in a manner analogous to the way one might pack a teacup in bubble wrap) and to cushion body parts exposed to high levels of mechanical stress (the heel and toe pads, for example, are ...

What is brown fat? ›

Brown fat, also called brown adipose tissue, helps maintain your body temperature when you get too cold. It's the same fat that bears use to stay warm when they hibernate. Babies are born with a lot of brown fat behind their shoulder blades. Newborns can't shiver, which is one of the ways the body creates heat.

Do skinny people get cold more easily? ›

Thin people's subcutaneous layer lacks adipose tissue, but fat people's subcutaneous layer contains adipose tissue, which functions as an insulator and keeps the body warm. As a result, thin people feel colder than fat people.

Does being underweight make you colder? ›

Being underweight, a lack of sleep, and dehydration can all leave you chilly, but other possibilities, such as poor circulation, iron deficiency anemia, and hypothyroidism, are difficult to determine without the help of a doctor's visit.

Do underweight people get cold easily? ›

Low body mass index (BMI)

People who are underweight (BMI of 18.5 or under) due to an eating disorder, such as people with anorexia nervosa, or those who lose body fat due to an illness, such as inflammatory bowel disease (IBD) or cancer, may be prone to feeling chilly more often.

Are skinny people less resistant to cold? ›

Body fat is an important factor affecting tolerance in cold environments, and individuals with a higher ratio of fat shivered less and dissipated less heat into their thermal environments than the leaner ones, owing to the insulative properties of the subcutaneous fat layer [[19], [20], [21]] and a smaller ratio of SSA ...

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