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.
What BMI Should an athlete have?
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.
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.
Do athletes have different BMI?
However, in the case of athletes, who may have a high body weight due to higher lean body mass, BMI may lead to misclassification of the athlete as overweight or obese. Thus, both BMI and body composition assessment should be conducted before determining if an athlete is overweight or obese.
What are the limitations of BMI for athletes?
The score is valid for both men and women but it does have some limits. The limits are: It may overestimate body fat in athletes and others who have a muscular build. It may underestimate body fat in older persons and others who have lost muscle mass.
What BMI should a runner have?
And a lower body-mass index seems increasingly important as race distances get longer: A 2014 study found that the optimal BMI for male 800 meter runners was between 20 and 21, while it dropped between 19 and 20 for male 10,000 meter and marathon runners.
Do runners have a higher BMI?
It fails to take into account a person’s bone density, waist size, age, race, and other important factors to determine obesity. … 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.
Why do I weigh so much but look skinny?
Since dense muscle tissue takes up less space than fat, it’s possible you may weigh the same (or even more) yet appear slimmer than another person with the same weight, a similar height and frame because of the difference in your body composition.”
What does BMI 30 look like?
82.6 / (1.67 x 1.67) = 30
A BMI greater than 40 is considered morbidly obese; between 30-39.9 is considered obese; 25-29.9 is considered overweight; 18.5-24.9 is normal; and less than 18.5 is underweight.
What is skinny fat?
“Skinny fat” is a term that refers to having a relatively high percentage of body fat and a low amount of muscle mass, despite having a “normal” BMI. People of this body composition may be at a heightened risk of developing diabetes and heart disease.
Why do athletes weigh more?
Athletes need to develop their muscles because stronger muscles tend to correlate with improved performance as long as the motor skill development is there. Developing muscle mass may increase an athlete’s scale weight.
Why does BMI not work for athletes?
The big reason why BMI has become the most common measurement of body fat is because it does work for the majority of people—because the majority of people are not athletes. … But it doesn’t work for many athletes or fitness-minded people, due to their above average level of muscle mass.
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.
What are 3 limitations of BMI?
Factors such as age, sex, ethnicity, and muscle mass can influence the relationship between BMI and body fat. Also, BMI does not distinguish between excess fat, muscle, or bone mass, nor does it provide any indication of the distribution of fat among individuals.
What are the limits of BMI?
Weight, obesity, and health risks
|Men 40 inches or less Women 35 inches or less|
|Underweight||18.4 or less|
What BMI should I be for my age?
According to the National Institutes of Health (NIH) : A BMI of less than 18.5 means that a person is underweight. A BMI of between 18.5 and 24.9 is ideal. A BMI of between 25 and 29.9 is overweight.