Get Stronger.
Perform Better.
Achieve Your Goals.
Affton and South County St. Louis' premier destination for longevity-focused personal training and youth athletic development.
Choose Your Path
Three distinct tracks designed for excellence in performance, longevity, and health.
The Longevity
& Wellness Track
For Adults Focused on Long-Term Health
Professional-grade coaching for individuals who prioritize their health and performance. We help you build sustainable strength, prevent injury, and optimize your energy—so you can excel in your career and enjoy life without compromise.
The Athlete
Development Track
Youth, Collegiate & Competitive Athletes
The bridge between potential and performance. We build faster, more resilient athletes using science-backed protocols used by Division-1 programs.
GLP-1 Strength
Training
Protect Your Muscle While You Lose Weight
On Ozempic, Wegovy, or Mounjaro? Up to 40% of weight lost can be muscle. Our specialized program preserves lean mass, boosts metabolism, and ensures the weight you lose stays off.
Why Output Performance?
We're not another big-box gym or revolving door of inexperienced trainers. Here's what makes us different.
Elite Credentials Only
Every coach holds NSCA-CSCS or NASM certifications—the gold standard in strength and conditioning. No part-timers, no weekend warriors.
Science-Backed Programs
No cookie-cutter workouts. We use evidence-based protocols proven in Division-1 programs, customized to your body and goals.
Built for Results
Whether you're 35 or 75, building strength or chasing championships—we deliver measurable, sustainable results. No gimmicks.
EXPERT COACHES,
PROVEN RESULTS
Our certified trainers bring years of experience and passion to help you achieve your fitness goals
Ryan Benson
Branch Director
Youth Performance Coaching • Strength & Conditioning • General Fitness • Adult Training
Keri Merkel
Director of Personal Training
General Fitness Training • Youth & Sports Performance • Senior Fitness • Women's Fitness • MMA Conditioning • Behavior Change
Jimmy Freeman
Director of Team Training & Programming
Strength Training • Powerlifting • Youth Athletics • Team Training • Olympic Weightlifting
Real People.
Real Results.
From youth athletes earning scholarships to adults reclaiming their health—these are the transformations happening at Output Performance.
"Output Performance changed my life. I'm 52, and I'm stronger now than I was in my 30s. Jimmy and the team don't just train you—they educate you. Best investment I've ever made in my health."
— Client Review
St. Louis Lives Transformed
Years Combined Experience
Evidence-Based Training
Expertise You Can Trust
At Output Performance, you aren't being "worked out" by a part-timer. Our coaches hold the industry's highest credentials and have a track record of transforming hundreds of St. Louis lives through evidence-based training.
National Strength & Conditioning Association Certified Strength & Conditioning Specialist
National Academy of Sports Medicine Certified Personal Trainers
Evidence-based training. Proven results. Zero guesswork.
A Premier
Environment
Located inside the 100,000 sq. ft. Center St. Louis complex in Affton, South County, our facility provides elite-level space and equipment without the crowded, intimidating atmosphere of a big-box gym.
Train in a professional environment designed for serious results. From specialized equipment to dedicated training zones, every detail is optimized for your success.
Tour The Facility →
Ready to
Get Started?
We don't believe in high-pressure sales. Every relationship at Output starts with a complimentary consultation to ensure we're the right fit for your goals.
Complimentary consultation • No commitment required