Elevate With Eric

Why You Need a Hydrostatic Body Fat Test

Let’s talk about something that drives me crazy in the fitness world: guesswork. You know what I mean—spending months grinding in the gym, eating “perfectly,” only to step on a scale and think, “Wait… is this even working?”

Here’s the truth:

Scales do not tell you the whole story.

That number staring back at you? It’s a cheap magic trick. It doesn’t tell you if you’re losing water weight, muscle mass, or actual body fat. Did you crush leg day and gain lean muscle while burning fat? The scale might call that a “failure” because the number didn’t budge. Did you dehydrate yourself for a week? Congrats, the scale will applaud you—while your body screams for help.

That’s why at my Fitness Retreat, we ditch the guesswork. One of the tests I use to customize my clients’ programs is the hydrostatic body fat test—the most accurate way to measure what’s happening in your body. 

What is a Hydrostatic Body Fat Test?

This Test is the Secret Sauce at My Fitness Retreat

Hydrostatic testing (or underwater weighing) measures your body fat by using one basic truth: muscle sinks, fat floats.

Here’s how it works:

We weigh you on land.

You sit in a warm water tank, exhale all your air, and get dunked underwater for about 10 seconds.

Our tech compares your land weight vs. underwater weight to calculate your exact fat-to-muscle ratio.

At my Retreat, we use it Day 1 to set your personal program and track your progress.

We retest you weekly. Imagine watching your body fat drop and your muscle mass climb on paper—while your energy soars and your clothes fit better. That’s the kind of motivation that keeps you going long after you leave Fitness Retreat. 

Let me show you why this matters.

Real Results: A Case Study

Below is the hydrostatic dunk tank report of a client in my athlete’s program. She struggled with weight loss until I shifted her focus to train hard in order to build her lean mass. By doing this, not only did her fat mass drop significantly, but her body composition improved dramatically. 


Body Fat Percentage: Dropped from 32.87% to 29.48% (-3.39%).
Total Weight: Decreased by 5 lbs (172 lbs to 167 lbs).
Lean Mass: Increased by 2.31 lbs, fueling her fat loss.
Fat Mass: Dropped by 7.31 lbs (56.54 lbs to 49.23 lbs).

hydrostatic body fat test

By prioritizing muscle, her body became a fat-loss machine. The scale said “5 lbs down,” but the real win is that she’s stronger, leaner, and set up for lifelong success.

If you’re serious about results, you need to measure what matters. The scale is a carnival trick. Hydrostatic testing? That’s your truth serum.

Stop letting a hunk of metal on your bathroom floor dictate your self-worth. Want to know if you’re actually making progress? Ditch the guesswork. Measure smarter, work harder, and trust the process that actually works.

Join us at Fitness Retreat or find a Hydrostatic Body Fat test near you

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