As we tell all our personal training and fitness boot camp clients at Genesis Gym Singapore. The idea that only weight and height are important for indicating your level of health is (thankfully) regarded as old fashioned and incomplete now.

Your level of body fat is a far better indicator of overall health, and risk of chronic lifestyle diseases like diabetes, cardiovascular conditions and some forms of cancer. Most notably:

• Esophagus
• Pancreas
• Colon and rectum
• Breast (after menopause)
• Endometrium (lining of the uterus)
• Kidney
• Thyroid
• Gallbladder

And possibly more.

But to track the progress of your training and nutrition program, you need a way to accurately track your body fat.

If it goes down, you are on the right track, and if it does not, or goes up, you need to make some modifications

But not all fat measurement methods are created equal. Here are some common, and not so common ones. From the pros and cons, you will be able to choose a method that suits you best.

BMI – Body mass index

• Pros: Very simple to do and great for big studies with hundreds of people because it can be calculated fast.
• Cons: Incomplete picture. Not so useful to each individual because it assumes quite a fat, and weak person as the norm. For example, even a moderately sized person who weighs 73kg at 170cm height would be overweight. Any male who exercises regularly can achieve that size. And some people are genetically thicker and bigger. BMI does not account for this either.

Circumference Measurements

• Pros: Quite easy to do as long as you get the points right.
• Cons: Does not take bone structure into account, and can vary from time to time. E.g. if you just had a meal, your waist would go up even though your fat level did not.

Fat Measurement Scales & Hand Held Devices

• Pros: Simple to use – hold the handles, press start.
• Cons: Wild fluctuations in measurements. This is because these use electrical methods which rely on your body’s current hydration status in specific areas of the body. This can change if you drink, eat, sit, stand, are in different parts of a menstrual cycle, sweat, etc. Accuracy tends to be plus or minus 7%. That is too much variance to know if you are truly progressing or not. For example if a person was 14%, he may measure at 7% (professional athlete) or 21% (fat!).

Caliper Measurements

• Pros: Very accurate if done right by a good practitioner, with good equipment. For lean people can be almost as accurate as a Dexa scan.
• Cons: Needs lots of constant practice to do properly. It is like playing a musical instrument. Literally thousands of measures before it becomes “2nd nature” and consistently correct.

Hydrostatic Weighing

• Pros: Accurate, and good for general population
• Cons: May not be as accurate for other populations e.g. athletes and elderly. This is because they have different bone and muscle densities that are not taken into account by the standard formulas

DEXA scan

• Pros: Super accurate, can give readings of not only total amount but also where the fat is distributed. E.g. fat around organs is more damaging to health.
• Cons: It is an x-ray so repeated radiation exposure may not be a good idea.

The most practical method if you were alone would probably be circumference measurements. But because that is not as accurate, it may be worth it to get professionally measured once in a while by either:

• A skilled practitioner with calipers.
• Or a DEXA scan.

There are some medical clinics which have DEXA scans for about $200 per scan.

If you choose the calipers route, here are some ways to tell if the person knows what they are doing, which will help you get an accurate result.

• They use good calipers (as seen above). The cheap white plastic ones are not accurate enough for professional use. A good caliper can cost more than 600 Singapore dollars. But good calipers such as Harpenden are accurate to 0.2mm and can even help a skilled practitioner see if you are retaining water.
• They measure fat often, every day if possible.
• They use at least a 7 site formula. A 12 site Bio-Signature formula is even better and more useful for problem spot reduction.
• They pinch your fat HARD and get ALL of it using a wide grip (not 2 fingers). The common mistake I see many practitioners make is they are afraid to cause discomfort to the client/patient. Sorry, if you are overly fat, it may be uncomfortable for a few seconds when your fat is being pinched. But you want an accurate result right?
• They try to measure at the same time of the day
• They don’t measure you after long flights
• They can tell you what to do to improve your results once you get them

There you have it! A short article about all the ways fat can be measured. Even if you choose a less than perfect measure, as long as you try to be as consistent with all the variables, it can still give you a somewhat meaningful result.

There is a saying that “you can’t manage what you can’t measure” and measuring body fat is certainly going to help you manage it with a lifestyle, nutrition and exercise program.

Coach Jonathan Wong is the owner of Genesis Gym Singapore which aims to provide the best personal training and fitness services in Singapore.