Marine-built, athlete-driven recovery in the heart of Austin. Assisted stretching, mobility therapy, VALD assessments, and one-on-one training — engineered around how you move.
Our Mission
At Semper Fi Mobility & Fitness, we focus on mobility and flexibility to help you improve overall health and increase energy. Every program is personalized — because no two bodies move the same way.
"Marines don't know how to spell the word defeat." Gen. Jim Mattis
How It Works
Your path to better movement starts with a simple three-step process.
Schedule a free 20–30 minute session. We’ll assess your needs and actually work on you during the consultation — not just talk.
We evaluate your mobility, identify problem areas, and build a personalized stretching or training program tailored to your body.
Come in for regular sessions and feel the difference. Less pain, more mobility, better movement — session after session.
What We Offer
From assisted stretching to personal training and advanced assessments, every session is tailored to your body's needs.
Our signature service. A trained specialist guides your body through targeted stretches to improve flexibility, reduce pain, and restore range of motion.
Book Stretching
One-on-one sessions designed to build strength, improve movement patterns, and hit your fitness goals with proper form and accountability.
Book Training
Advanced corrective movement assessment that identifies the root cause of pain and dysfunction in your movement patterns.
Book NKTInvest in Your Future
First we measure how you move. Then we build the program to fix it. Two pieces of pro-grade tech, working together.
Step 1 — Assess
Markerless motion-capture used by NFL, NBA, MLB, and EPL teams. We track joint angles, asymmetries, and rep-by-rep mechanics in real time — no guesswork, just data.
Step 2 — Train
Once your assessment is done, we take those results and build a custom workout program inside Move Health — delivered straight to your phone. Every client we assess gets access.
Why Stretching Matters
Relieve chronic back, neck, and joint pain through targeted mobility work.
Correct muscle imbalances caused by sitting, driving, and daily habits.
Speed up muscle recovery and reduce soreness after workouts.
Move freely and perform better in sports and daily life.
Release physical tension that contributes to mental stress and anxiety.
Build resilience and reduce your risk of strains, pulls, and tears.
Transparent Pricing
No hidden fees. Free consultations available for both stretching and personal training.
Memberships & Packages Available
Ask about our in-studio memberships and multi-session packages for the best value. Contact us for details
Book your free consultation or jump straight into a session. Your body will thank you.
Book on VagaroWhat Our Clients Say
“I can’t recommend Trey enough. As someone who plays roller derby and also spends long hours sitting at a desk for work, my body takes a beating in very different ways: tight hips, stiff back, sore shoulders, you name it. Working with him has made a huge difference in how I feel both on and off the track.”
Google Review
“I’ve been working with Trey for about 6 months now and have seen some incredible improvement in the areas that I came for. Trey always seems to know what to do when I come in with my aches and pains. Highly recommend his services to anyone that wants to feel better and get healthier.”
Google Review
“I have been coming to Trey for 3 years now, and I can honestly say that I have never felt better. He also has a special gift for working with the neck and jaw. Trey is incredibly knowledgeable about the human body and how to stretch it safely and effectively.”
Google Review
“I recently sprained my ankle pretty bad. I was recommended to Trey through friends around town. By far the best work I’ve been around. He knows his stuff and will get you right!”
Google Review
“What a difference good stretching can make in your life! I met Trey about a year ago, and I can’t tell you how much he has helped me with all my past injuries. I am ready to fly every time I visit Trey and get a stretch.”
Google Review
“Had my first session with Trey yesterday and am super pleased with the results. I have always suffered from hip and lower back tightness but even after one session I can tell a remarkable difference in my mobility.”
Google Review
“Trey is the absolute best! In less than an hour I go from stressed out and knotted up from a week of work to relaxed and ready for my weekend. I don’t know how I could get through my weeks as a dental hygienist without him.”
Google Review
“Started seeing Trey on Mondays after my busy soccer Sundays. For years I would walk around stiff legged and in pain but after my first session with Trey, I felt like a new person.”
Google Review
“Highly recommend a weekly assisted stretch to anyone who wants to keep their body moving at peak performance. Trey is awesome and one of the best at knowing how to help you achieve what you want.”
Vagaro Review
“Mr. Trey Willis was great and would recommend him to anyone with an issue with their muscles, excellent customer service and a great educator.”
Vagaro Review
Common Questions
Comfortable, stretchy clothing similar to what you’d wear to the gym or a yoga class. Avoid jeans, belts, or restrictive clothing. We want you to be able to move freely.
Not at all. Our stretches are gentle and controlled. You may feel a deep stretch, but it should never be painful. We communicate with you throughout the session and adjust to your comfort level.
For best results, we recommend 1–2 sessions per week. Consistency is key — just like going to the gym, regular stretching compounds over time. Many clients notice a difference after their very first session.
Let us know before your session. Our specialists are trained to work around injuries and medical conditions. We’ll modify techniques as needed. If you’re recovering from surgery, we recommend getting clearance from your doctor first.
Absolutely. Your first consultation is a free 20–30 minute session where we actually work on you — it’s not just a sales pitch. We’ll assess your mobility, identify areas that need attention, and give you a feel for what our sessions are like.
Assisted stretching focuses on flexibility, mobility, and pain relief — we do the work while you relax. Personal training focuses on building strength, improving movement patterns, and hitting fitness goals through exercise. Many clients benefit from both.
Not yet, but we’re working on it. Stay tuned — we’ll update this as soon as it becomes available.
Community
Sunshine Run — Team Booth
Sunshine Run — VALD HumanTrak Setup
Sunshine Run — On-Site Assessment
Fleet Feet Austin
Fleet Feet — Community Event
Roller Derby — Event Day
Roller Derby — IASTM Recovery
Roller Derby — Athlete Recovery
Roller Derby — Upper Body Mobility
Roller Derby — Stretch Session
Know someone who could use less pain and more mobility? Semper Fi gift cards are perfect for birthdays, holidays, or just because.
Buy a Gift CardLove your results? Spread the word. Refer a friend to Semper Fi and help them discover what better movement feels like.
Contact Us to Refer
Meet the Founder
Founder & Lead Stretch Therapist · USMC Veteran
With over 10 years in the fitness industry and a background in kinesiology, Trey brings a disciplined, science-based approach to every session. After serving 4 years in the United States Marine Corps, he struggled with chronic back pain and a herniated disc — until he discovered the power of stretch therapy.
That experience became his mission. Semper Fi Mobility & Fitness was born from the belief that everyone deserves to move without pain.
Our Team
Every member of our team is trained to help you move better.
Stretch Specialist • NASM: Stretching & Flexibility
From Midland, Texas, now in Austin. Collegiate sprinter at Concordia University (2020–2024) where he earned his degree. Now into half marathons, strength training, and exploring the distance side. Over a year at Semper Fi taking care of clients through training and recovery.
Stretch Specialist • Licensed Massage Therapist • NKT
Licensed Massage Therapist since 2014 with deep experience in preventative care, biomechanics, and fascial work. Attended the Rolf Institute for Structural Integration in Boulder, CO in 2015 and spent eight years there before returning to Texas. Discovered NeuroKinetic Therapy (NKT) in 2022 — she loves it because muscle testing uncovers compensation patterns and gets to the source of pain. Believes movement is medicine and is passionate about helping people understand their bodies through modern science and holistic care. Inspired by Traditional Chinese Medicine and balance in all things. She also brings her best buddy Paco to work — and they’d love to meet you. — Be like water, my friend.
