Precision Fitness Assessments &
Exercise Testing in Mill Valley, CA
At Endurance PTC’s state-of-the-art eLab in Mill Valley, we offer science-backed exercise and physiological testing to help you train smarter. Whether you're a competitive athlete, a recreational cyclist, or just getting started on your fitness journey, our data-driven evaluations are tailored to support your personal performance goals.
Our testing services are trusted by athletes across the Bay Area for their accuracy, customization, and ability to deliver real results. These include:
VO2 Max Testing
Lactate Threshold Assessment
Resting Metabolic Rate Testing
Sweat Sodium Testing
Body Composition Analysis
Running Economy Testing
INSCYD Metabolic Profiling
Field & Group Performance Assessments
All assessments are performed by certified exercise physiologists using clinical-grade equipment.
Why Choose eLab at
Endurance PTC?
Personalized Testing. Professional Interpretation. Proven Results.
We don’t just hand you numbers—we help you interpret them. After each test, you'll receive a detailed breakdown along with custom recommendations for endurance training, hydration strategies, nutrition, and more. Everything is designed to fit your unique physiology and fitness level.
We proudly serve clients from Mill Valley, Marin County, and across the San Francisco Bay Area.
Who Benefits from
Our Testing?
We've designed our lab to meet the needs of every body - from accountability seekers and fitness enthusiasts to elite competitors. Whether you're interested in a fitness assessment, looking to measure your body composition, or optimize your cycling performance, we have a test for you.
Explore our most popular packages:
Endurance Athlete Bundle
Sweat & Hydration Profile
Body Composition + RMR Combo
Want to learn more? Contact us for a free consultation or check out our FAQs.
Ready to train smarter?
Book your exercise testing appointment at our Mill Valley performance center today and get personalized insights to power your fitness journey.