Metabolic Flex coaching

Use every tool. Keep only the habits.

A science-driven approach: medication, hormones, a metabolic breath device, training and nutrition, coordinated by a coach who checks in with you every two weeks, until behavior does the work.

Take the 2-minute Metabolic Score

Training at GFC Xtreme Fitness.

Science-drivenEvery part of the program is built on published research. See the studies.

Keep your muscleLose fat without losing the muscle that runs your metabolism.

Know when to eatFree Lumen metabolic device ($249 value) with your program: see fat vs. carb burn each morning.

Every tool, in orderGLP-1s, peptide therapy and hormone therapy via licensed providers when appropriate.

Coach every 2 weeksDiscipline, accountability, consistency: a plan that becomes a lifestyle.

The Lumen metabolic breath device beside a phone showing a low-carb meal plan and a fresh salad

Free with your program · $249 value

Know when to eat

One breath into the Lumen each morning shows whether your body is burning mostly fat or carbs. That's your metabolic flexibility, measured daily. Your coach uses it to time your meals and carbs around your training.

How it works →

Built on evidence

Why this approach

58%lower risk of type 2 diabetes with a structured lifestyle program in the Diabetes Prevention Program.

25–40%of weight lost on GLP-1s can be lean mass without a structured strength program.

~80%of insulin-driven glucose uptake happens in muscle, your metabolic organ.

8 in 10adults with pre-diabetes don't know they have it (CDC).

Read the science and all references →

Real clients, real words

Training doesn't stop working at 40

Arlyn Haas, 46

"I have been into fitness all my life. Today, at 46, I find myself in great shape... after working with Gui Cury for the past year, I can truly say, I found MY PERSONAL TRAINER."

Zulema Lopez, 45

"At 45 my body changed and I wanted to get back in shape. I started working with Gui and — wow — I saw a total difference. Truly excellent."

Coach Gui, GFC Xtreme Fitness

Every two weeks you meet with the same coach, who reads your Lumen and check-in data and adjusts your training and nutrition so you keep your muscle and burn the fat.

B.S. Chemistry · M.S. Food Science · NFPT-Certified Personal Trainer · former college athlete (tennis, soccer)

More about your coach →