What is obesity? – Mia Nacamulli

What is obesity? – Mia Nacamulli

The most basic function of bodily fat
is self-storage of food reserves. In prehistoric times, natural selection
favored genotypes that could endure harsh conditions
by stocking the most fat. With chronic malnutrition being
the norm for most of human history, genetics evolved to favor fat storage. So when did body fat become problematic? The negative impacts of being overweight
were not even noted in medical literature until as late as the 18th century. Then, technological advances coupled
with public health measures resulted in the betterment of the
quantity, quality, and variety of food. Sustained abundance of good food
enabled a healthier population to boom economically. Output increased,
and with it, leisure time and waistlines. By the mid 19th century, being excessively
overweight, or obese, was recognized as a cause of ill health, and another century later,
declared deadly. What is the distinction between being
overweight and being obese? A calculation called the BMI
breaks it down for us. For example, if someone weighs
65 kilgorams and is 1.5 meters tall, they have a BMI of about 29. Obesity is a condition of excess body fat that occurs when a person’s BMI
is above 30, just over the overweight range
of 25 to 29.9. While BMI can be a helpful estimate
of healthy weight, actual body fat percentage can only
really be determined by also considering information
like waist circumference and muscle mass. Athletes, for instance, have a naturally
higher BMI. So how does a person become obese? At its most basic, obesity is caused
by energy imbalance. If the energy input from calories is greater than the energy output
from physical activity, the body stores the extra calories as fat. In most cases, this imbalance comes
from a combination of circumstances and choices. Adults should be getting at least
2.5 hours of exercise each week, and children a whole hour per day. But globally, one in four adults
and eight out of ten adolescents aren’t active enough. Calorie-dense processed foods
and growing portion sizes coupled with pervasive marketing lead to passive overeating. And scarce resources, and a lack of access to healthy,
affordable foods creates an even greater risk
in disadvantaged communities. Yet, our genetic makeup also plays a part. Studies on families and on separated twins have shown a clear causal hereditary
relationship to weight gain. Recent studies have also found
a link between obesity and variations in the bacteria species
that live in our digestive systems. No matter the cause, obesity is
an escalating global epidemic. It substantially raises the probability
of diseases, like diabetes, heart disease, stroke, high blood pressure, and cancer. It affects virtually all ages, genders,
and socioeconomic groups in both developed
and developing countries. With a 60% rise in child obesity globally
over just two decades, the problem is too significant to ignore. Once a person is obese, the climb
to recovery becomes progressively steeper. Hormonal and metabolic changes reduce
the body’s response to overeating. After losing weight, a formerly overweight
person burns less calories doing the same exercises as a person who is naturally
the same weight, making it much more difficult
to shed the excess fat. And as people gain weight, damage to signaling pathways makes it
increasingly difficult for the brain to measure food intake
and fat storage. There is, however, some evidence that well-monitored,
long-term changes in behavior can lead to improvements
in obesity-related health issues. And weight loss from sustained
lifestyle changes, or invasive treatments
like bariatric surgery, can improve insulin resistance
and decrease inflammation. What was once an advantage for survival
is now working against us. As the world’s population continues
to slow down and get bigger, moving and consciously eating our way
towards a healthier weight is essential to our overall well-being. And with the epidemic affecting
every country in the world for different socioeconomic reasons, obesity cannot be seen
as an isolated issue. More global measures for prevention are essential to manage
the weight of the world.

100 Replies to “What is obesity? – Mia Nacamulli”

  1. what's with these "weight loss green store tea" comments?
    no really, you're seriously marketing in an over-obvious way.

  2. And this dose not help it when you dont eat right? Its just as bad? and is it true it can hurt you OR kill you if you dont eat for a long time? I mean after awhile you stop then you do eat it can hurt you right? because your body not used to not eating and can be painful or deadly when trying to add it back into your body?

  3. Calling obesity an 'epidemic' is detrimental to people's view of the problem. Yes, it IS a health problem but it's not a disease, which is what epidemic implies. Fat people aren't 'sick' and a crushing majority of them know they've got a problem that needs changing. By calling it an 'epidemic' and treating it like a disease makes obese people feel like social pariahs. We're targeted enough as being 'lazy' and 'greedy' and 'gluttons' and 'stupid'. There's no need to label us like we've got some disease that we only have ourselves to blame. :

  4. When you said "gender", you only displayed the male and female symbols. Isn't that discrimination? What about the other dozens of made up genders that they keep inventing?

  5. This video was created too recently to use BMI as any kind of reference, as within the last five years it has been proven to be inaccurate.

  6. In Malaysia, the BMI readings for normal is 10 – 19.9, overweight is 20 – 24.9 and obese is 25 and above. Just a fact I wanted to throw out there.

  7. i have to say, thanks for saying things about diabetes! im diabetic but quite skinny. thanks for talking about it! my mom has been wanting people to support me for my diabetes.

  8. Why don't you just go to Ultraslim? Look it up to those who are over weight they have technology that litarley melts your fat by using a red light, no laser, no excess fat somewhere else, litarly all that happens is when the light hits the fat cells in you body open there cell membranes, which then leak fat to your organ systems to get rid of,

  9. obesity is the obstacles I'm always having to move out the way for on the pavement and block my route out of the supermarket

  10. First regulate sugar content in commercial food products. At the very least, mandate food products with sugar content exceeding certain threshold warn about health impact in their commercials and packages like tobacco.

  11. I am normal weight! My body mass index is 21.29 and my school and my family keep calling me overweight just because I weigh about 103 – 115 pound. I was 5ft and 11 year old.

  12. obesity is an epidemic
    FAM!!! im from kenya where obese ppl get rushed and robbed just to get the food
    obese ppl are seen as rich coz they hav money for food
    obesity is a problem in the western world, not the whole world

  13. What doesn't make sense to me is that the BMI considers me extremely obese when I'm a M/L size and have a defined waistline. I'm overweight, I'll admit that, but not nearly as much as the BMI says I am. The icing on the cake is that it's a required test to pass in school unless I do 2 extra years of PE :/

  14. http://3harmfulfoods.com/m-video.php move around exercise drink tea eat healthy i quit chips yogurt bars white bread they are very toxic try going organic as possible eat veggie on the table not a plate of chips .. smaller plates no juice water hot drinks

  15. so go throw out that fast food burger and fries and don't take another bit! (jkjk, but try for your future health)

  16. Me : I don't exercise cause I HATE exercise. I only do voice exercise which the only one I like cause I like to sing. But I'm still in shape

  17. Mia Nacamulli's lessons leave something to be desired. It's not that her information is wrong (which it frequently is) but her lessons often contradict. In this one,she mentions increasingly nutritious food as a catalyst for obesity in the early industrial age. Then, she says nutrient-poor foods are keeping us obese now.

  18. I'm obese. I've tried to change that for many years. I have Gastric Sleeve surgery, I'm still obese. The Doctors like to blame ALL my health issues on the "catch all" being obese.

  19. I am overweight because I eat too much and do so little. So to maybe fix this Obesity I will eat less depending on my environment and actually eat stuff I need and not junk food

  20. The epidemic is sugar/carbohydrates being too available than it should. Humans do not require carbohydrates to survive.

  21. Rich people eat a lot but don't do a lot of physical work.
    Poor people do a lot of physical work, but can't eat a lot.

  22. Misconception. I dare you to get 2000 calories from only simple refined sugars and animal derived food for a period of time. Followed by another period in which you get 2000 calories from only veggie and fruits. You will find out which 2000 calories actually cause you problems. Not all calories are the same.

  23. Well I have i medical condition that usually leads to being overweight or obese but I got lucky getting a fast metabolism for my condition

  24. "Adults need 2.5 hours of exercise a week"

    Me *works a manual labor job for 8 hours a day"

    Me: "That's it!? Well at least I've got that part down" 😂

  25. It disgusts me how some people are proud of being obese. It's like saying "I'm happy I've got cancer!"

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