Your coach

Coach Gui

Founder of GFC Xtreme Fitness. I coach people to become metabolic dysfunction free with a science-driven approach: every tool that works, used in the right order, until the habits are yours.

Take the 2-minute Metabolic Score

Coach Gui on the GFC Xtreme pre-diabetes program.
Background

Trained in the science, not just the gym

Before GFC Xtreme, I was a college athlete in tennis and soccer, then went on to earn a B.S. in Chemistry and an M.S. in Food Science — the exact background behind how nutrition, metabolism and training interact. I'm also an NFPT-Certified Personal Trainer. That's why every program here is built on published research, not trends.

B.S. ChemistryThe chemistry behind metabolism, blood sugar and how your body processes food.
M.S. Food ScienceHow nutrition actually works at a biochemical level, not just calorie counting.
NFPT-Certified Personal TrainerNationally certified in program design and safe, effective training.
College athleteCompeted in tennis and soccer — trained like an athlete long before coaching like one.

How I coach

DisciplineA clear weekly plan: three strength sessions, protein at every meal, and a walk after your biggest meal.
AccountabilityA 1:1 session with me every two weeks, plus a 60-second daily check-in I read.
ConsistencySmall habits, repeated, measured by your Lumen each morning, until you need the tools less.
Coach Gui training on the cable machine Coach Gui throwing a Muay Thai kick on pads

What a session looks like

  1. Your data first: we review your Lumen trend, check-ins, weight and training log from the last two weeks.
  2. What worked, what didn't: we keep what's working and fix one thing at a time.
  3. Your next two weeks: training loads, protein target and meal timing, adjusted to your numbers.
  4. Tools check: if you use a GLP-1, peptides or hormone therapy through GFC Lab, we build around it so you keep your muscle and burn the fat.

Client results

Two GFC Xtreme clients after 90 days of coached strength training and nutrition, shared with their permission.

Client front view before and after 90 days, 30 pounds lost
Client side view before and after 90 days, 36 pounds lost

Individual results. These are not typical and not guaranteed. Results depend on starting point, adherence, medication and individual biology.

What clients say

Arlyn Haas Arlyn Haas, 46

"I have been into fitness all my life. Today, at 46, I find myself in great shape. I have been fortunate enough to work with different trainers throughout the years, all of them amazing in their own way. But after working with Gui Cury for the past year, I can truly say, I found MY PERSONAL TRAINER."

Zulema Lopez Zulema Lopez, 45

"After becoming a mom of 3 girls, 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 in my body. I loved the routines and the care Gui put into building them around each of our needs. Truly excellent."

Melissa Rocher Melissa Rocher

"From the first phone conversation I had with Gui I knew I wanted to work with him because he was so enthusiastic about it! He's been an amazing trainer with an ability to push you to your limits. He really cares about his clients, and is very structured and well educated in fitness training. Best decision I've made in a long time!"

Rodrigo Bravo Rodrigo Bravo

"Gui is a great guy, great trainer and works on helping you reach your specific goals. I highly recommend him."

Thomas M. Thomas M.

"Gui is exceptional. Clearly educated on physical health and nutrition. Excellent customer service — Gui simply cares about your fitness goals. I've been training with Gui for 4 weeks and am very pleased with my results. An awesome trainer as well as a good friend."

Joseph Savarese Joseph Savarese

"I am very impressed by the professionalism and knowledge that Gui has shown from the very first training session. Gui is also very punctual and focused on results."