Who are you training for?
Adults
Coach-led strength, power and conditioning classes six days a week. First class free, then $199/month, or drop in.
Try a free class →Ages 10–18Youth athletes
Speed, strength and movement built on a long-term development model. Starts with a free 30-minute evaluation with a coach.
Book the free evaluation →High school to proCompetitive athletes
A force-plate assessment first, then an individual program run in coached sessions. Retested every block.
Start with an assessment →Onyx OnlineNot in Miami
The same programming and the athlete app, wherever you train. $24.99 a month, the first 7 days free.
Train online →Testing days, programmingTeams & schools
Testing days, group programming and reporting for a whole roster, run as your own space in our system.
Talk to us →Not sure? Answer two questions and we route you. Prices and what's included are on Memberships.
A SPORTS SCIENCE
PERFORMANCE
LAB.
Onyx Performance Lab is a sports science and coaching facility in Miami. We build individualized programs from your test results: data-driven, not template programming.
THE TESTING ARSENAL
Every Onyx athlete starts with a complete battery of performance tests. The data shapes the program. The program drives the results.
YOUR
NUMBERS.
Force Plates
Bilateral and unilateral force-time analysis. Identifies power deficits, asymmetries, and reactive strength capacity.
VBT System
Real-time bar speed tracking and load-velocity profiling. Train the right zone every session.
Sprint Timing
Laser-precise timing gates from 10m to 40m. Acceleration mechanics, max velocity, and deceleration assessment.
Metabolic Testing
Full aerobic capacity profile. Energy system diagnostics that inform conditioning and recovery protocols.
Anthropometrics
Body composition, limb lengths, and structural profiling to contextualize strength and power outputs.
Movement Screen
Systematic movement quality assessment to identify compensations, mobility deficits, and injury risk factors.
The Process
Test
Complete battery of performance assessments. Force plate, VBT, sprint analysis, and metabolic. No assumptions.
Analyze
Data interpreted in context. Benchmarks compared against sport, position, age, and athletic history. Gaps identified.
Program
Individualized training plan built from your results. Every exercise, intensity, volume, and sequence is intentional.
Train
Coached execution in a structured environment. Technique, cues, and real-time feedback on every rep.
Retest
Scheduled re-assessment every 4–6 weeks. Progress measured against baseline. Program updated based on new data.
One System
Runs It All.
Most gyms hand you a coach and a clipboard. At Onyx, your training runs on software that records every session and test, adjusts your program from your own numbers, and keeps your reports in one place. It is called Onyx Performance OS, and it comes with your membership.
Every Athlete.
One Standard.
Build the Foundation
Long-term athletic development for young competitors. Age-appropriate movement, coordination, and strength training, structured for growth, not burnout.
What Athletes Say.
"Amazing improvement in my skills after training here. Would highly recommend. Great environment — absolutely loved it!"
"Onyx Performance Lab is perfect if you're looking for a more personal and laid-back atmosphere. The space is well-equipped with everything you need for a great workout. What really stands out is the one-on-one attention from Alex. He genuinely cares about your fitness goals and will work with you to create a plan that fits. The gym is clean and never feels overcrowded."
"If you're looking for a gym with great energy and top-notch support, Alex Garcia is awesome and always willing to help you crush your fitness goals!"
Before
You Book.
BOOK YOUR
FIRST
VISIT.
Adults: your first performance class is free. Youth: a free 30-minute evaluation. Competitive athletes: a force-plate assessment. Tell us who you are and we'll book the right first visit — or route yourself in two questions.