What is Body mass index (BMI): definition and uses

What is body mass index

What is Body Mass index or BMI?

Body mass index or BMI is a person’s weight in kilograms divided by the square of height in meters. BMI does not measure body fat directly, but research has shown that BMI is moderately correlated with more direct measures of body fat obtained from skinfold thickness measurements, bioelectrical impedance, densitometry (underwater weighing), dual energy x-ray absorptiometry (DXA) and other methods 1,2,3. Furthermore, BMI appears to be as strongly correlated with various metabolic and disease outcome as are these more direct measures of body fatness 4,5,6,7,8,9. In general, BMI is an inexpensive and easy-to-perform method of screening for weight category, for example underweight, normal or healthy weight, overweight, and obesity.

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How is BMI used?

A high BMI can be an indicator of high body fatness. BMI can be used as a screening tool but is not diagnostic of the body fatness or health of an individual.

To determine if a high BMI is a health risk, a healthcare provider would need to perform further assessments. These assessments might include skinfold thickness measurements, evaluations of diet, physical activity, family history, and other appropriate health screenings.

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OVERWEIGHT PREGNANCY SYMPTOMS

Do you want to know the effects of being overweight while pregnant? These are some of the overweight pregnancy symptoms. Being overweight increases the risk of complications for pregnant women and their babies. The higher a woman’s BMI, the higher the risks of high blood pressure and pre-eclampsia – if you have a BMI of 35 or above at the beginning of your pregnancy, your risk of pre-eclampsia is twice that of women who have a BMI under 25.

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Your weight during pregnancy

Your weight during pregnancy matters a lot. If you are very overweight (usually defined as having a BMI of 30 or above) and pregnant, don’t try to lose weight during your pregnancy, as this may not be safe. There is no evidence that losing weight while you’re pregnant will reduce the risks.

The best way to protect your health and your baby’s health is to go to all your antenatal appointments so that the midwife, doctor and any other health professionals can keep an eye on you both. They can manage the risks that you might face due to your weight, and act to prevent – or deal with – any problems.

It’s also important to eat a healthy, balanced diet and get some physical activity every day. You should be offered a referral to a dietitian or other health professional for personalised advice on healthy eating and how to be physically active during your pregnancy. Being physically active in pregnancy will not harm your baby.

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Your Weight(kg):
Your Height(cm):

Your BMI:
This Means:

 

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what is body mass index? … or BMI is a person’s weight in kilograms divided by the square of height in meters. BMI does not measure body fat directly,

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