Personal Trainers

Expert Personal Trainers for Strength, Endurance & Injury Prevention

Looking for a personal trainer who actually gets you? Endurance PTC in Mill Valley partners with a select group of independent personal trainers. Each one is a self-employed professional with years of experience in strength training, injury prevention, and functional fitness. We serve clients of all fitness levels throughout Marin County and the greater Bay Area.

The trainers we work with customize every session to match your goals, lifestyle, and ability. Whether you’re focused on performance, rehab, or total-body wellness, you’ll find unmatched support here.

What Sets Our Trainers Apart?

  • 20+ years of hands-on experience

  • Certifications in biomechanics, rehab, and sport-specific training

  • 1:1 and small group sessions available

  • Direct access to eLab services like metabolic testing, sweat testing, and body composition analysis

  • Thoughtful, strategic training that helps you feel and perform your best.

meet the PERSONAL TRAINERS

Expert trainers for every goal, from foundational fitness to peak performance.

kelli robinson

Kelli is a former collegiate and pro soccer player, now a highly credentialed fitness professional with over 25 continuing education programs and certifications. She’s passionate about delivering credible, results-driven fitness guidance tailored to each client.

Outside the gym, Kelli stays active with sea kayaking, boxing, skiing, and outdoor adventures alongside her dog, Boomer.

Ready to move, feel, and play better? Kelli’s here to help.

“Train smart, play more, be fearless!”

christine waldron

Christine is a licensed physical therapist specializing in orthopedics, now offering personal training in Mill Valley. With a background in clinical physical therapy, she focuses on functional, full-body strength training while prioritizing injury prevention.

An avid runner, Christine finds joy on the trails, hills, and steps of Mill Valley.

Charles Walz

Charles is a certified personal trainer and fitness specialist based in Marin County with over 25 years of experience. Each session starts with a simple but powerful question: “How do you feel today?”—guiding a personalized workout focused on your goals. Charles blends strength training, cardio, and flexibility for a balanced, results-driven approach.

He holds certifications in Advanced Personal Training (ACSM), Exercise for Older Adults, Spinning, and TRX instruction.

mark zeeman

Mark Zeeman is one of Marin’s top personal trainers, known for helping clients of all ages and fitness levels achieve lasting results. A former competitive athlete and combat veteran in the South African Defense Forces, Mark served as the primary fitness trainer for his battalion.

Since moving to the U.S. in 1999 and earning his ISSA certification, he’s built a loyal client base—from professional athletes to those just beginning their fitness journey.

“Health is not about the weight you lose, but the life you gain.”