Have you ever been able to remember someone’s face while walking on the street even though you’ve only seen them once before?
You don’t remember the person’s name but you remember their face quite distinctly. I know this has happened to me plenty of times.
The reason you were able to identify the individual is due to the firing of a neuron in the visual cortex of your brain corresponding a memory of the individual. The face (memory) of the individual was stored in the fired neuron.
The AI body fat calculator replicates this process using a convolutional neural network (CNN) that artificially simulates the way memory works, i.e., neurons fired in the visual cortex. Instead of faces, however, we hope to identify an individual’s body fat percentage.
Just as the human face has some distinct characteristics, body fat percentages at different ranges share similar characteristics as well. It should be noted that the distribution of fat, overall muscle mass, age, and gender can skew results, and this will be expanded in the section below.
Source: Architecture of a CNN
As with anything new and interesting, there are always limitations to what can be achieved. I tried to break down everything I could think of that is holding this web app back from being the best of the best.
As with most projects of this nature, the biggest limiting factor is data. Yes, a data set was put together to build the model running on this web app; however, I am afraid there could be biases against individuals of certain ethnicities and age groups as they are underrepresented in the model.
I tried to make the best of what was available but I know that is not enough. If you are interested in helping make this web app run even better, there is a way you can help me. Check the Help Make The Body Fat Calculator Better section below.
Visceral fat is the fat surrounding your organs, while subcutaneous fat is the fat under your skin. The fat most people know of is the one that they grab onto, which is the subcutaneous type. However, visceral fat is the one that is more dangerous.
This web app can only give you an estimate of your total body fat percentage. It does not estimate a breakdown of visceral to subcutaneous fat. If you are looking for a breakdown of your visceral to subcutaneous fat, I suggest getting a Dexa Scan done if you can afford the $150.
Dexa Scans shoot two low frequency x-rays through your body and are able to identify your muscle mass, bone density, and type of fat distribution.
Unless the modern cell phone can shoot low frequency x-rays, the probability of this model being able to detect visceral fat is zero.
The reason this is important to know is because even individuals with low body fat percentages can have a high visceral fat level if they lead an unhealthy lifestyle, which can be equally dangerous as someone who is obese.
An easy way to tell if you potentially have visceral fat (this won’t work for individuals with low body fat percentages for obvious reasons) is if you have a waist-to-hip ratio over 1.0 for men and over 0.8 for women. Use this web app as a reference guide only.
This limitation in the model will affect individuals (mostly women) with a higher fat distribution in the thighs and buttocks, as the image classifier is built to detect the body fat percentage from just the upper torso.
The gynoid fat distribution is influenced by the hormone estrogen, which is higher in women and contributes to the natural ‘hourglass’ figure. Excess body fat in a woman’s hips can increase the risk of venous thromboembolism or dangerous blood clots in the veins. If this web app becomes popular and more data becomes available, hopefully this limitation can be eliminated.
This is not a specific limitation of the web app; however, I need to touch upon this issue as the result obtained through the app could be misleading. Just because you’ve received a body fat percentage in a healthy range doesn't guarantee that you are automatically healthy.
If you smoke cigarettes, eat junk food more often than wholesome food, drink sweetened fruit juices or carbonated sodas or alcohol in excess, and generally lead an unhealthy lifestyle, there’s a high probability that your internal organs are surrounded by visceral fat.
The reason for your healthy body fat percentage is that you probably have fast metabolism and great genetics. This helps to keep you looking skinny, which may lead you to (falsely) believe that you must be healthy simply because you are not overweight.
However, because the web app cannot detect the type of fat you have, it is very important to keep this in mind and always aim to lead a healthy lifestyle.
If you work out and are muscular but still overweight (with low belly fat), a BMI calculator and even the calculator on Estimate Body Fat will be doing you injustice.
Externally you may have all the markings of an unhealthy person, but internally your body is very healthy based on the lifestyle you lead.
But keep in mind that bringing your body fat percentage to a healthier range can help ease the pressure on your knees, help you run faster, help in getting more proportional clothing, and maybe even trim some of the fat from your double chin.
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