The Metabolic Mastery Method™

Use weight-loss meds
the right way!

Don't waste your time and money wrecking your metabolism.

Our data-driven program helps you unlock amazing results!

3-10+ lbs Pure fat loss measured in one week
Up to 100% Lean mass preserved
3-4× Faster than medication alone

These are examples from measured client outcomes, not typical or guaranteed results. Individual results vary based on starting point, health status, medication, program length, and adherence. Weight-loss medications should be used only under the care of a licensed prescriber.

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A pill or injection by itself can’t be true health...

Taking weight-loss medication by itself does not help you understand how much protein you need to build lean mass, how to train, or whether the weight coming off is pure fat or muscle. Lean mass loss is destroying your metabolism!

Here's how Fitness Retreat helps: we protect and build your lean mass while you lose pure body fat, whether you're still on your medication, coming off it after your stay, or stopped before you got here.

Fitness Retreat coach spotting a client on a strength machine
01

Protect your lean mass

When guests who used a GLP-1 take their first test here, we often see they lost a lot of lean mass along with the fat. So we make sure your body gets the protein and resistance training it needs to hold on to lean mass, the engine of your metabolism, while the fat comes off.

Fitness Retreat coach training a client on the turf
02

Eat enough to train hard

We feed you protein, carbohydrates, and fat together every 3 to 4 hours. Your energy stays steady, your head stays clear, and you have the fuel to train hard enough to protect your body.

Resting metabolic rate test at Fitness Retreat
03

Build lean mass, burn more

The more lean mass you carry, the more calories you burn all day, even at rest. So we train you to build lean mass while the fat comes off, and your metabolism works for you.

Hydrostatic body composition test at Fitness Retreat
04

Measure the fat you lose

The scale can't tell fat from lean mass. Hydrostatic body composition testing can. We test you every week, so you see pure body fat coming off and lean mass going up.

Fitness Retreat coach and client sharing a high five on the field
05

On it, coming off it, or already off it

Some guests are still on their medication while they're here. Some come off it after their stay, and some stopped before they arrived. We test where your body is today and build your plan around it, so you keep your lean mass, keep losing fat, and keep the results when the prescription ends.

The proof: a real 12-day result

Lance R. Age 59

10.4 pounds down.
Lean mass up.

Most programs would celebrate a 10.4-pound drop and stop there. Fitness Retreat measured what actually changed: Lance lost 12.84 pounds of fat and built 2.44 pounds of lean mass.

Measured Apr 27 to May 9, 2026

What actually changed

He lost fat, not lean mass.

That difference matters. Muscle drives metabolism, strength, shape, and the ability to keep weight off. Weekly hydrostatic testing showed exactly what to adjust in Lance's food and training.

Starting weight 244.8 lbs
Ending weight 234.4 lbs
Program 12 days

Drag the cube or use the controls

01Fat mass

Lost

12.84 Pounds of fat
94.86 lbs82.02 lbs

Test. Adjust. Test again. The scale cannot separate fat from muscle. Weekly body-composition testing can, and that data tells Eric's team what to change next.

Individual results vary. Measurements reflect Lance's recorded results from April 27 to May 9, 2026.

Fitness Retreat was built to solve this.

Eric Viskovicz created Fitness Retreat in 1997 because guessing does not work. His system combines body-composition and metabolic testing, measured nutrition, serious training, and behavior coaching. Every decision is tied to what your body is actually doing.

GLP-1 questions, answered

Do you provide GLP-1 medications?

No. Fitness Retreat does not prescribe, sell, or administer GLP-1 or any other medication. Your prescription stays with your own doctor or prescriber. We coach the nutrition, training, testing, and habits around it.

Can I come to Fitness Retreat while I'm on a GLP-1?

Yes. Some guests are still on their medication while they're here. We build your meals and training around where your body is, so you get the protein and resistance training you need to protect your lean mass. Check with your prescriber before your stay.

What if I already stopped my medication?

You're a great fit. Your first tests show how much fat and lean mass you have today, and your plan is built from those numbers so you can rebuild lean mass and keep losing fat.

Will you tell me to stop or change my medication?

No. Decisions about your medication stay between you and your prescriber. If you plan to come off it after your stay, we'll help you build the nutrition, training, and habits to keep your results.

Why do you measure lean mass instead of just weight?

The scale only shows total weight. Hydrostatic body composition testing shows how much of what you lose is fat and how much is lean mass, so we can adjust your food and training every week.

What happens after my stay?

You leave with a clear plan, the FitCulture app, and the Fitness Retreat Metabolic Mastery Method, so you can keep protecting your lean mass and losing fat at home.

Stop guessing. Start losing fat the right way.

Weight-loss medication can be a tool. It is not the whole plan. Protect your lean mass, keep your metabolism working, and build results you can actually keep.

Book a consultation