Creating 52C, we tried to make it a modern, yet simple, substitute for the traditional clipboard and pencil. The primary advantage 52C had over a piece of paper so far was the presentation of client’s progress – graphic, clear, generated automatically from brief notes. But here comes another thing pen & paper are not able to do for a Personal Trainer: multivariable fitness assessments. For starters, check the three body fat test you can now carry out within seconds using 52C and simple skinfold calipers.

Measuring body fat percentage

According to the survey the body fat percentage is one of the most frequently measured body composition factors. How is it usually measured? Unfortunately, not everyone has access to specialist equipment for bioelectrical impedance analysis or even more complicated methods.

Skinfold measurements

The most popular way of estimating body fat percentage is skinfold caliper measurement. That obviously requires certain measurement skills from the trainer, but is affordable and quite easy to perform regardless of where the test is carried out.

A trainer usually knows how to do all the measurements, but then they have to collect the measurements, manually calculate the result, and store the score in the client’s file for further comparison. The whole process usually takes a while, and for some trainers may be problematic – let’s get this straight not everyone has to be a math master (we’re lucky enough to have one in our team).

So what would be a perfect solution to make the process a lot easier and more time-efficient? We thought that the trainer should be able to just put in the measurements, and not to worry about the rest.

Which body fat skinfold tests can you perform using 52C?

There are three most popular methods for estimating body fat percentage using calipers

  • Jackson-Pollock 3-site Test


  • Jackson-Pollock 7-site Test


  • Durnin-Womersley 4-site Test


Whichever you prefer, they are all available now. And all you have to do is:

  1. Choose the client whose measurements you’re about to collect.
  2. Choose one of the three available tests – just start typing the name of the test and it will appear on the drop down list.
  3. Put in the measurements and click ADD.

52C will do all the math for you, classify the score according to the norms provided in ACE Personal Trainer Manual 4th Ed., and graphically present the results.


We left for you only the pleasant part: present to your client the significant progress they’ve made training with you. It’s important to show them an evident proof for the effects of your cooperation.


What if you have some past results of these tests to add to a client’s profile?

You’ve been doing the calculations yourself for some time, it would be such a shame if you wouldn’t show the past results on the graph as well. No worries, cause you can also put in the final result straight into the third input and set the date of the previously taken measurement. This way you’ll have the complete progress report for your client.

Who benefits from all that?

Well, you definitely do – you save some of your precious time carrying out professional tests. You don’t have to worry about the equations and norms tables anymore. Do the trainer’s job – leave us the math.

Your clients benefit from it as well. They feel they’re provided with professional fitness care – not only during training sessions, but also when it comes to assessment of their results. They can see the results with their own eyes, which makes them more encouraged to keep working with you towards their goals.

To sum up

We hope you’ll like the new body fat assessments in 52C. Test them out and let us know what you think! That’s even not all yet. Actually, that’s just a start. Stay tuned for the upcoming articles considering more new features we recently added or are about to add to 52C.

See also:

New Fitness Assessments in 52C: Cardiovascular Tests >>

New Fitness Assessments in 52C: Strength & Flexibility Tests >>

Special thanks to our advisor Will Bruce, who inspired us to take up the challenge of implementing multivariable assessments and without whom we would be hardly able to implement them the way we did.

About Cathy Patalas

The sports soul and the alleged specialist in words of The main 52C Blog writer. A diligent student at the English Department of the University of Wroclaw, majoring in applied linguistics. An ex-acrobat and aerobic gymnast with the 13-year long experience in „training for winning”. A multiple medallist of Poland nationals in acrobatic gymnastics, and academic nationals in aerobic gymnastics. A fan of gymnastics of every existing type. Personally, finds making everyday choices in a healthy lifestyle even more demanding a challenge than making everyday sacrifices in the athlete’s lifestyle.