VO2 MAX SF · Inside Custom Fit
VO2 Max Testing in San Francisco
Know your fitness. Train with purpose.
Measure your aerobic fitness with a treadmill or bike test, understand your heart rate training zones, and review your results with our certified VO2 technologist. Visit us at Custom Fit, 323 Octavia Boulevard. Allow 45–60 minutes for your appointment.
Turn your test results into a training plan
Meet your VO2 technicians
Get to know the team behind your test. Our Custom Fit team brings experience in exercise physiology, nutrition, and personal training to your VO2 Max SF visit.
Mark Eaton
Director of Sports Performance & Testing · Exercise Physiologist · VO2 Technician
Mark combines exercise physiology with experience in gyms and physical therapy settings. His work connects fitness, wellness, and an understanding of human movement.
Credentials & education
- ACSM Certified Exercise Physiologist
- NASM Certified Personal Trainer
- BS, Kinesiology/Neuromuscular Science — San Francisco State University
- RunDNA Level 1 Gait Analyst
- Certified Bone Densitometry Technologist (CBDT) — UC San Diego
- American Red Cross CPR/AED
Kai Samiere, RDN
Registered Dietitian · VO2 Technician · Operations Manager
Kai brings sports-nutrition experience with Stanford’s team and a personal passion for surfing. His approach connects evidence-based nutrition, consistency, and everyday performance.
Credentials & education
- Registered Dietitian — Commission on Dietetic Registration
- BS, Nutrition — California Polytechnic State University
- MS, Health and Wellness Management — Merrimack College
- Dietetic Internship, Sports Nutrition & Entrepreneurship — Wellness Workdays
- Certified Bone Densitometry Technologist (CBDT) — UC San Diego
Pete Fonteneau
Personal Trainer · VO2 Technician
Pete uses testing and tracking to guide individualized training. His experience includes rehabilitation settings, group training, and athletic development, with a focus on lasting movement habits.
Credentials & education
- Bachelor’s degree in Kinesiology — Sonoma State University
- Certified Bone Densitometry Technologist (CBDT) — UC San Diego
Brandon Tran
Personal Trainer · VO2 Technician
Born and raised in San Francisco, Brandon combines functional strength training with a background in wrestling, boxing, and Muay Thai. He focuses on building confidence, durability, and fitness for the long term.
Credentials & education
- NASM Certified Personal Trainer
- NASM MMA Conditioning Specialist
- MATRIX SPRINT 8 Certified
- American Red Cross Adult and Pediatric First Aid/CPR/AED
- BA, Sociology / Cultural Studies — San Jose State University
Part of the Custom Fit team.