For most people, BMI provides a “reasonable measure” of body fat, but is not accurate for athletes (who weigh more because of muscle) or older people who have lost height, he said. Other methods of measuring body fat also have their pros and cons.
Is BMI accurate if you are muscular?
A glob of muscle weighs about 18 percent more than the same size glob of fat. So, according to the BMI, the sprinter is more overweight than the sedentary person. But as I said earlier, a glob of muscle weighs about 18 percent more than the same size glob of fat, so this is clearly not an accurate statement.
What is the ideal BMI for athletes?
The American Exercise Council on Exercise recommends a BMI at or above 18.5 and body fat of 14 percent for women and six percent for men. The best athletes in sprint events tend to have a larger mean mass and height than long-distance runners.
What is wrong with BMI for athletes?
An example of the biggest flaw in using BMI
Muscle weighs more than fat (it is denser, a cubic inch of muscle weighs more than a cubic inch of fat). Therefore, BMI will inevitably class muscly, athletic people as fatter than they really are.
Why do athletes have a high BMI?
“Besides muscle, bone density is a big wild card,” Nelson said. And highly trained athletes are at a greater disadvantage: their excess muscle typically puts them at a higher BMI, so they may actually be considered obese.
Is it OK to be overweight with muscle?
BMI isn’t perfect
It often identifies fit, muscular people as being overweight or obese. That’s because muscle is more dense than fat, and so weighs more. But muscle tissue burns blood sugar, a good thing, while fat tissue converts blood sugar into fat and stores it, a not-so-good thing.
Why do I weigh more than I look?
One easily forgotten reason is that your weight only indicates your body mass index (BMI), not your body composition, which is the amount of muscle versus fat you have on your body. Your body composition makes a huge difference in what you look like even though it can’t be measured by the scale.
What is the ideal weight for athletes?
The “ideal” weight for a 5’2″ female athlete would be 131 lbs. But for a 5’9″ female athlete it would be closer to 163 lbs. Conversely, if a 5’9″ female athlete only weighed 135 lbs (a BMI of 20), that could have a negative impact on their performance potential.
Is BMI better than body fat?
While BMI is a rough estimate of body fat, body fat percentage is a more accurate number. BMI, but not overfat. Likewise, a person of normal weight on the BMI scales may still be overfat and at risk of weight-related diseases.
What if my BMI is high but I’m muscular?
Your muscle mass makes up most of your weight
Read more A looong arrow, pointing right or overweight based on their BMI alone. Someone who has a high BMI due to muscle mass most likely doesn’t need to worry about the health problems associated with obesity and being overweight.
What is Usain Bolt’s BMI?
Sprinter Usain Bolt’s BMI, calculated as 24.5, is just within the healthy range. Of course, BMI shouldn’t be used to measure athletes’ health. BMI is the measurement of a person’s weight in kilograms, divided by their height squared in centimetres.
Do doctors still use BMI?
It is used in population studies, by doctors, personal trainers, and others. However, BMI has some important flaws. For example, it does not measure overall fat or lean tissue (muscle) content. BMI is derived from a simple math formula.
Is BMI inaccurate?
Is the BMI an accurate measure of health? The short answer, not in and of itself. Here’s what the BMI is: “Your BMI is calculated by dividing your weight by your height squared to give you a number of kilograms per meter squared,” says Dr. Lee.
Is a 25 BMI bad?
A normal BMI is between18. 5 and 25; a person with a BMI between 25 and 30 is considered overweight; and a person with a BMI over 30 is considered obese.
What is a good body fat percentage?
With that in mind, think of BMI and body fat percentage as just one way to assess and monitor your weight and overall body composition.
Ideal body fat percentage for men.
Can athletes be overweight and healthy?
“You can have someone with a high BMI (body mass index) who exercises, and someone with a low BMI who doesn’t, and the high-BMI exerciser could be the much, much healthier person.” But that extra weight comes with risks, even in athletes. … In fact, putting on muscle, which weighs more than fat, can pack on extra pounds.