Personalized functional fitness in Grafton
Whether you are returning to exercise, looking for personalized support, or
want to preserve strength while using a GLP-1, we will help you find the right
place to start.
★★★★★ 5-star local coaching - No pressure or obligation

Your first step
Everyone begins from a different place. Start with a free 15-minute call with Oscar. He will learn
about your goals, answer your questions and help you choose the right first visit.

SUPPORTIVE GROUP TRAINING
Build Confidence in a Supportive Group
Experience the Tri90 approach through a complimentary group training session. You’ll train alongside individuals with a similar ability level in an encouraging, coach-led environment.
Anyone new to Tri90 or returning to exercise
Those who prefer the energy of a group setting
Building confidence with functional movement

PERSONALIZED ONE - ON - ONE TRAINING
A personal plan built around your body
Meet one-on-one with a Tri90 coach to evaluate your current movement, mobility, strength and stability. We’ll help you understand where you are today and identify the best next step for your goals.
A conversation about your goals and challenges
An evaluation of movement, mobility and strength
Personalized recommendations for moving forward

STRENGTH SUPPORT FOR GLP-1 USERS
Lose weight while protecting strength
Created for individuals using GLP-1 medications who want to support their weight-loss journey by building or preserving strength, stability, flexibility and functional movement.
A review of your current strength and mobility.
Guidance focused on maintaining lean muscle
A personalized path based on your body and goals
Not sure which is right? Book your free call and we will help you decide →
Tri90 meets you where you are, then helps you build confidence, strength and consistency one step at a time.
“I walked into Tri90 an obese smoker approaching my 65th birthday. One year later I have lost weight, quit smoking and developed muscle tone and strength.”
“Oscar adapted and customized a program for me. The other gym members are genuine and supportive.”
90
days to build the foundation for a lasting lifestyle

90
days to turn better
habits into a
lifestyle
We are passionate about what we do
At Tri90 Fitness, we believe that anyone, regardless of age or skill level, can enhance their health and wellness through three steps: stabilization, strength and power. By focusing on these three steps, we guide our clients through a series of challenging but attainable movements, all while ensuring proper form and muscle engagement. No matter their past, we are excited to help them build their future.
Did you know it takes 90 days for a habit to become a lifestyle change? At Tri90 Fitness, we are not satisfied with just making better habits. We are looking to help our clients reach total lifestyle changes that will stick with them for life.
With our 90-day program, we know we can help our clients reach their next level of fitness. We customize each plan to meet the individual needs of our clients. Let us work with you to find and maintain the changes you have been looking to make to your lifestyle.
Personalized plan
All ages and abilities
Sustainable progress
Coaching built around you
Every Tri90 trainer is trained in the Tri90 Method, ensuring you receive the same proven foundation for improving strength, stability, mobility, and long-term health.
But the right trainer is also a personal fit. Each member of our team brings a unique personality, coaching style, professional background, and area of expertise. We’ll match you with the trainer best suited to your goals, experience level, and the kind of support that helps you succeed.




Our motto for training is to build resilience, move with intention and purpose, and build an engine that can power you for a lifetime.
Unlike traditional fitness approaches, Tri90 prioritizes the way your body is designed to move, rather than forcing it into rigid training methods.
Correct imbalances, prevent injuries and train for longevity.
Develop strength at the joint level and in real-world movement patterns.
No more guessing. No more temporary fixes. This is lifelong fitness with a community that supports your journey.
Most fitness programs focus on aesthetics or short-term strength gains but fail to address the way your body is meant to move. At Tri90 Fitness, we believe in functional movement that helps you regain control, prevent injuries and build lasting strength at the joint level. This is not about lifting heavier or just looking fit. It is about moving better, feeling stronger and living longer.
Move the way your body was meant to
We reset and rebuild your foundation with mobility, core activation, balance work and corrective movement.
Get strong where it matters most
We develop muscles, tendons and joints through progressive resistance and functional movement patterns.
Unlock your athletic potential
With mobility and strength established, we add safe, dynamic movement that supports the demands of real life.
There is no greater investment than your health. In 90 days, you will not only see changes in your body, but also feel stronger, more confident and inspired to care for your overall wellness inside and outside the gym.
If you are ready to start making better choices and show up for yourself in ways you may not have in a long time, we are here to guide you every step of the way.
Oscar Charles Jr., founder and head trainer at Tri90 Fitness, has spent the past five years building more than a gym. He has created a supportive community centered on lasting transformation.
Tri90 focuses on mobility, strength, stability, and functional training designed for real life. Whether you want to keep up with your kids, move without pain, or simply feel stronger, Oscar and his team meet you where you are and help you move forward.
Through personalized coaching and a proven 90-day system, Tri90 helps people of all ages and abilities create sustainable physical and mental change. Every program emphasizes proper form, purposeful movement, and steady progress that builds strength, resilience, and confidence.
What began as Oscar’s vision has become a trusted place for people who once felt too old or out of shape to begin. At Tri90, the commitment goes beyond working out. It is a commitment to moving better, feeling stronger, and living a healthier life.
Tell Oscar about your goals and what has been holding you back. Together, you will determine whether Foundations, one-on-one training or GLP-1 strength support is the best fit.
Free phone consultation · About 15 minutes · No commitment required

Functional fitness for lifE
[email protected]
1206 10th Ave, Grafton, WI 53024
312-545-6106