Last week Nutritionize brought out the Fitness Wave dunk truck to MHF and had about 15 people from around the area get dunked. Hydrostatic testing is considered the "gold standard" when it comes to calculating body fat%; it is reliable, accurate, and repeatable. It works by measuring the amount of water you displace when you first enter the tank. Then uses a specific equation, based on the following principles, to calculate body fat based on your body density:
The density of fat mass and fat-free mass are constant
Lean tissue is more dense than water
Fat tissue is less dense than water.
Therefore person with more body fat will weigh less underwater and be more buoyant.
Body Fat compared to Body Weight?
The human body is composed of a variety of different tissue types including lean tissues (muscle, bone, and organs) that are metabolically active, and fat (adipose) tissue that is not. The household scale measures a person's total body weight without taking into consideration lean mass to fat ratio. A person who is 250lbs with 8% body fat could be inaccurately considered overweight. Inversely, someone who looks great and weigh 110lbs with 25% body fat could be mistaken for being healthy. Body fat % can be a determinant of health and performance (varies by sport). Studies agree that too much body fat can lead to disease and poor health. Relying on the home scale alone is not good enough, if you haven't ever had a bf test, get one done.
The first time I got dunked was 4/2009 at which point I was already crossfitting for one year along with other activity. Since then I attended Robb Wolfs seminar, adopted the zone/paleo lifestyle and began learning and sharing my knowledge with others through Nutritionize. I absolutely feel great and my performance has definitely increased over the year but seeing my bf% change was shocking and supports even further that Nutrition is key!
Test 1 4/09: 22.3%
Test 2 3/10: 15.2% (change of 6.1%)
Test 3 goal: 13%
Walking in to the truck I told Aeron my goal was 17% which I felt fairly confident about achieving, I was pleasantly surprised and shocked with the results. I told him the only thing that changed in one year was my focus on nutrition. Even though I still indulge here and there with red velvet cupcakes and pizza, I made some major shifts in my carbohydrate sources, meal balancing and supplementation. What I want to point out is my body weight only dropped by 1-2lbs in a year and was not reflective of the change in body composition. Many people rely on the scale to indicate success or failure of a new plan, this is a huge mistake! Remember there is a difference between body weight and body fat, and the goal is lose the body fat. Making even the smallest change is a step closer to achieving your goals.
Post to comments what your dunking experience was like… what is your goal?
Saturday April 17th 9am
On-ramp Nutrition Seminar: open to anyone interested in learning the basic principles of proper nutrition.
Here is an awesome resource it's a 92 page recipe book of all primal/paleo foods: http://liveprimal.com/LPrecipes.pdf