So what is BMI? In fitness and exercise terms BMI is not a budget airline, it’s actually an acronym for Body Mass Index. To calculate your BMI you need to record your height and weight and the body mass index calculator on this site will do the rest for you.

Ok, so now I know my BMI, what now? Well for starters you BMI can be worked out by both our site and, if you’re lucky enough to have one, a Nintendo Wii Fit. But remember that this is general advice for adults only and does not apply to children.

Once you’ve worked out your BMI, remember to take into account your build and current body frame, for example if you’re an athlete, body builder, pregnant or breast feeding, your BMI may not be accurate.

If you’re over 60 then your BMI may not be accurate as when you get to this age your bones actually become lighter as you reach this age.

Simply, BMI provides a simple numeric measure of a person's "fatness" or "thinness", allowing health professionals to discuss over- and under-weight problems more objectively with their patient, and plan specific training programs geared to your targets, either bulking up, or slimming down.