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Doctor insights on: Bmi Heavily Muscled

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Muscle (Definition)

It is a body tissue that has the ability to contract. It shortens and generates force. It relaxes and returns to its original length. Muscles move joints, stabilize the body, move air and food through the organs, act as valves for bladder, bowel and other organs. They control movement of the eyes. They help us express ourselves by changing the shape of our ...Read more


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Why does BMI increase when one starts weight training and replacing fat with muscle mass? Weight increases while becoming leaner, but BMI increases?

Why does BMI increase when one starts weight training and replacing fat with muscle mass?  Weight increases while becoming leaner, but BMI increases?

Not perfect!: Bmi only takes into account weight and height. That is good enough for most people but for people that exercise a lot and have a lot of muscle it is not a good reflection of their actual fitness. Muscle weighs more than fat so the bmi can increase even though you are in better shape. Most pro athletes have bmis that are in the "wrong" range. Worry about your overall health and not the number. ...Read more

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Is BMI a good way to determine proper weight? I've heard body fat % is morene accurate. A 5-6 solid muscle guy could be over 200 lbs& considered obese

Both would be best.: The BMI reflects your weight with respect to your height, but as you suggested does not reflect body composition. People who are very muscular could have a higher BMI that would not be truly reflective of their fitness and health. Combining the BMI with a body fat percentage would greatly increase its accuracy. ...Read more

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I am gaining weight after anorexia for the past month (BMI reaching 17 after being at 15). Any chance I could build up muscle? If so, how can I do it?

I am gaining weight after anorexia for the past month (BMI reaching 17 after being at 15). Any chance I could build up muscle? If so, how can I do it?

Requires using them: Muscle cells respond to both intensity & frequency of use. Without use the atrophy away, as in polio victims. Polio virus damage nerves, not muscles. But if muscles get no nerve orders, they rarely contract & waste away. Thus focus on all opportunities to use muscles to do actions which require/challenge your strength, hopefully without overdoing & creating damage. Athletes say: No Pain, No Gain. ...Read more

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I weigh 230. I have 100lbs muscle, large frame, and BMI of 38.9% @ 5'5". Is a weight loss of 90lbs healthy or too aggressive?

I weigh 230. I have 100lbs muscle, large frame, and BMI of 38.9% @ 5'5". Is a weight loss of 90lbs healthy or too aggressive?

Need weight loss: Remember that any significant weight loss will reduce your risk of cad, dm, cancer, arthritis, HTN and alzhmiers even if you do not loss the whole 90lbs. ...Read more

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Does the BMI chart take muscle into consideration?

Does the BMI chart take muscle into consideration?

Only weight/height: No, the bmi chart only takes into account weight and height, which makes it only a rough guide. It can be especially misleading in men who are muscular and stocky. ...Read more

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How can you understand the BMI when calculating with muscle?

BMI and muscle: The bmi is a good guide for most people, but it is not an indicator of obesity in some groups. Bmi is just weight/height squared. It does not take into account muscle. Muscular men can have a high bmi and be lean. ...Read more

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Could it happen that a BMI calculator tell the difference between muscle and fat?

No: Bmi is simply a calculation based on height and weight. Since muscle weighs more than fat, muscular people will have higher bmis than normal. Body builders typically have bmis in the "obese" category (over 30), but they are not obese and many times have very low body fat. ...Read more

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What's your take on bmis? I know people who are more lean/muscle and are in the obesity range whereas im skinnyfat & "healthy" despite minimal muscle

What's your take on bmis? I know people who are more lean/muscle and are in the obesity range whereas im skinnyfat & "healthy" despite minimal muscle

BMI & body fat %.: The BMI reflects your weight with respect to your height, but as you suggested does not reflect body composition. People who are very muscular could have a higher BMI that would not be truly reflective of their fitness and health. Combining the BMI with a body fat percentage would greatly increase its accuracy. ...Read more

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How can I lower my BMI but increase muscle mass?

How can I lower my BMI but increase muscle mass?

High protein: If you decrease your food intake while raising your protein intake and doing high intensity resistance training, you should be able to decrease your weight and increase your lean weight. This is not easy to achieve both at the same time, but it is not impossible. ...Read more

Dr. Cornelius O'leary jr
543 doctors shared insights

Body Mass Index (Definition)

Body mass index (BMI) is a measurement based on a person's height and weight, to decide if a person is too heavy or too light for his height. The index is a number that can be in the underweight range, normal range, overweight range, or obese range. Children use different number ranges than adults do, ...Read more


Bmi (Definition)

Bmi or body mass index is how we define if a person is under or overweight. It is calculated my taking your height in meters and dividing it by your weight in kilograms squared. Or using a bmi calculator. A normal weight is a bmi between 18-25. Obese is a ...Read more