Do you ever wonder about your weight? "Am I too fat?", "Am I too thin?", "Is this weight right for my height?" Questions like these come to all of us. So, there is a simple way to know if our weight is at a healthy level. This method, which even doctors use first, is called BMI.
Simply put, what is BMI?
The full name of BMI is Body Mass Index . Simply put, this is a simple way to measure whether you have a suitable weight for your height. This can give you a rough idea of the amount of fat in your body. When a doctor checks your health, this BMI value is also used as a measurement.
BMI is calculated by taking your weight (in kilograms) and dividing it by the square of your height (in meters). That is (weight in kg) / (height in m). If this seems a bit complicated, don't worry. There are many BMI calculators online that will help you easily find your value by entering your height and weight.
But the most important thing we need to understand here is that BMI alone cannot tell you 100% whether you are healthy or not . This is just a test. Although this value is related to the amount of fat in most people's bodies, sometimes it can be wrong. The doctor assesses your health status by combining BMI with many other tests and information.
What do BMI values mean?
Usually, an adult is classified into different weight categories based on their BMI. This can give you an idea of where your weight falls.
| BMI value (kg/m²) | Weight Category |
|---|---|
| If less than 18.5 | Underweight |
| If between 18.5 and 24.9 | Healthy weight (Optimum range) |
| If between 25 and 29.9 | Overweight |
| If between 30 and 34.9 | Obesity - Class I obesity |
| If between 35 and 39.9 | Obesity - Class II obesity |
| If more than 40 | Obesity - Class III obesity |
Important: This classification does not apply to infants and young children. Ask your doctor about the healthy weight range for their age and height.
What are the health risks of having a low or high BMI?
It is very important to have the right amount of fat in our body. Fat helps the body absorb vitamins and minerals, provide energy, regulate body temperature, and protect organs. However, too much or too little fat can cause a number of health problems.
If your BMI is less than 18.5 (underweight)
If your BMI is less than 18.5, it means you are underweight. This can increase your risk of developing certain health problems.
- Malnutrition: Insufficient intake of nutrients required by the body.
- Anemia: Lack of blood in the body, frequent fatigue, paleness.
- Weakened immune system: Increased risk of developing diseases quickly.
- Osteoporosis: A condition in which bones become weak and break easily.
- Infertility: Difficulty having children.
If your doctor determines that you are underweight, he or she may recommend things like blood tests to check your overall health.
If your BMI is more than 25 (overweight or obese)
In general, as BMI increases, meaning as body fat increases, the risk of developing the following diseases increases.
- Heart disease
- High blood pressure (Hypertension)
- Type 2 diabetes
- Gallstones
- Osteoarthritis: Inflammation of joints , especially the knees and hips.
- Sleep apnea
- Some types of cancer: colon, breast, uterine, and gallbladder cancer.
- Depression and other mental health problems.
But remember, a high BMI does not necessarily mean that all of these diseases will develop. Also, even if your BMI is normal, you can still develop these diseases. Other factors, such as our genes, smoking, and alcohol consumption, also play a major role in this.
What are the limitations of BMI? Why is it not 100% accurate?
Although BMI is a very useful and quick measurement, it also has some major limitations. So don't worry too much about your BMI.
Think of an athlete who has worked out hard and built muscle. His weight gain may not be due to fat, but to muscle. But if you look at his BMI, it's possible that he falls into the "Overweight" category. But in reality, he has very little body fat. Isn't that wrong?
For these reasons, BMI is not the same for everyone.
- Difference between muscle mass and fat: BMI cannot distinguish between lean body mass and fat mass.
- Gender: Women generally have more body fat than men, but the same BMI chart is used for both.
- Where body fat is stored: BMI cannot tell where fat is stored. For example, fat stored in the belly area (belly fat) poses a greater health risk than fat stored in the thigh area.
BMI is not the right measurement for these people!
It is not appropriate to use the standard BMI chart to measure body fat for people in the following categories:
- Athletes and bodybuilders
- Children and teenagers
- Pregnant women
- People over 65 years of age
- People who have muscle atrophy due to a medical condition
So, as you can see, BMI is only part of the picture, not the whole picture. To get the best understanding of your weight and health, it's important to talk to your doctor. He or she will take into account everything from your BMI, waist circumference, lifestyle, and family medical history to give you the advice you need.
Take-Home Message
- BMI is a health screening tool: it's a quick way to see if you're at a healthy weight for your height. But it's not the only way to make a final decision about whether you're healthy or not.
- Not suitable for everyone: The standard BMI chart does not give an accurate picture for people like athletes, pregnant women, and children.
- Overall health is important: In addition to maintaining a healthy weight, it is also important to eat a balanced diet, exercise regularly , and avoid smoking and alcohol.
- Talk to your doctor: If you have any concerns or doubts about your weight, BMI, or related health risks, the best thing to do is to see your doctor and talk about it.
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