Understanding Series:

Body Mass Index (B.M.I), what does it tell you?

In a previous blog we asked you a simple question, “Do you know your numbers?” where we discussed the importance of your B.M.I, BP and Cholesterol. In this series of blogs, we will be exploring what these values actually mean and how they work to give you a better understanding of your body.

As discussed earlier, a healthy B.M.I value is between 20-25 , but why is this considered healthy? Why not 20-30  and of course we will be addressing the age-old question of muscles vs fat.

Q. What is a B.M.I?

A. Simple and effective method of determining your risk of developing weight-related diseases. 

Explanation – Body Mass Index is a numerical value derived from the relationship between the weight and height of an individual (weight (kg) / height (m2)). This value (B.M.I) may be used to determine the potential risk of developing diseases associated with excess weight, such as;

 Q. Why is the healthy range set at 20-25kg

A. This is the range at which you are at the lowest potential risk of developing weight-related diseases. The taller you are, the more weight your frame is able to carry without negative effects.

Think of your car and tyre pressure, the right tyre pressure makes it safest. At a lower or higher pressure, driving becomes difficult, your body’s function is the same.

Explanation – As stated in the previous explanation, this scale is used to determine your potential risk. The human body through millennia of evolution has been optimised to operate physiologically at a certain weight (or weight range). This weight may differ from one individual to another based on unique criteria such as ones height. Ultimately, if an individuals mass is not within the optimised range, they are at risk of developing negative health conditions as the body is not functioning efficiently.

Q. Muscle vs Fat, how can a high B.M.I made of muscles be unhealthy / obese?

A. A healthy B.M.I indicates the range at which you are potentially at the lowest risk of developing disease as a result of your weight. Having a high B.M.I comprised of muscle does not negate this, it only changes the type of disease you are at a higher risk of developing.

Explanation – As stated in the previous explanation, the body has been optimised to function within a certain weight range, exceeding this range regardless of composition does not negate risk. It simply alters the disease profile of the individual. A number of the aforementioned diseases have other factors (lifestyle, genetic) that can increase potential risk, while some are directly impacted by weight. Individuals with a high BMI constituted by a high muscle density are of an elevated risk of:

If you’d like to get a free B.M.I check, pop into your local NewWeigh Pharmacy  and sign up for 3 Free MRP Samples on our home page.