No gym today – it is good to have a break every few days, though I must admit my mood can be a little off without my endorphin fix.
89.6 kg today
Anyway the BMI or Body Mass Index is an often used system to determine whether someone is normal weight or under/overweight. However, it is a fairly blunt instrument which has some weak points.
There are plenty of BMI calculators available online – my Iphone even comes with an application to calculate it and graph it if I want it to.
The calculation is based on weight and height with age and gender often being factored in as well. An outline of some of the maths involved can be found here.
Typically a BMI result of between 18.5 and 25 is considered “normal” with lower than 18.5 considered underweight. 25 to 30 is considered overweight, while above 30 is considered obese. Though these values and ranges can vary slightly from website to website.
According to the application I am using at the moment my BMI is 27.2, firmly in the overweight category.
As I mentioned earlier, while the BMI is a widely used tool, it is also a fairly blunt instrument. For example, it cannot differentiate between muscle and fat, hence most bodybuilders are classed as overweight or even obese even when their body fat composition is below 5%. Indeed, some health insurance companies will refuse to cover bodybuilders due to their high BMI.
Unfortunately, I can’t use the excuse of excess muscle to explain my 27.2 BMI 🙁
According to my calculations to get a BMI of 25 I should weigh exactly 82 kg. However, given this is 7.6 kg away and that I’m not convinced of the reliability of the BMI I’m going to set an initial target of 86 kg, see how long this takes and then reassess my plans.