This past weekend, I had one of the most informative weekends of my entire fitness-junkie career! I got a Hydrostatic Body Composition test, a Resting Metabolic Rate (RMR) test and VO2Max test. Some of you may be wondering what in the world these are, so before I get into my results and how they will impact my training (and eating) I’m going to explain a little about each of the tests and why they’re important. If you’re familiar with these tests, skip over this next section and get to reading at the end.
Hydrostatic Body Composition Test
This is a fat test. Without going into too much complex detail, the way that this works is you get weighed on an underwater scale. You go into a tub and submerge your entire body onto this underwater scale, while underwater you blow out as much air as you possibly can from your lungs. This technique is more accurate than a fat scale, body pincher or hand-held body composition scanners at the gym.
It’s actually more important to know your body fat composition than your weight. Say what?!? The reason for this is because someone can be very thin and in the normal range of weight while having a high body fat percentage and on the flip side someone can be on the higher end of the scale and have a low body fat percentage. Also, the fastest and most efficient way to change the way your body looks is to lower body fat and build lean muscle. Read more about body fat tests.
Resting Metabolic Rate (RMR) Test
This test determines how many calories you burn while at rest. The way the test works is you sit in a comfortable chair for 12 minutes while breathing into a tube.
The importance of this test is to determine how many calories someone needs to lose, gain or maintain weight. It can explain why despite eating a low-calorie diet you’re not losing weight. Believe it or not if you’re not getting enough calories that can hinder weight loss and muscle-building. Our bodies are very complex systems and there is more to meeting fitness goals than just exercising more and eating less.
The VO2max test measures your maximum level of exertion, in other words it measures how intensely you can possibly work-out before you can’t workout any more. It distinguishes if you are burning body fat, muscle & fat or purely muscle as you exercise. This test is performed on a treadmill while wearing a mask and breathing into a tube.
Since I am someone who is interested in burning fat it’s important for me to know my fat-burning zone, so that I can train in the fat burning zone. Since I want to build muscle and keep it on, I don’t want to be in the muscle-burning zone.
I am very happy to have taken the above tests, because now I have an actual baseline to track my results. My body fat percentage is 16.4%, for a 30-year-old female 20-25% body fat is considered good. Naturally I am very happy to have a low body fat percentage. I see this as a testament to the healthy lifestyle changes I have made over the past years and all that my trainer has taught me.