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Underground Fitness
- Fat
- Back
- Plan
“Gill customizes the workouts and diet plans based on your goals, availability, current state, and injuries you might have had to ensure you have the most optimized plan to achieve your goals.”
Best Personal Trainers in Castro Valley, CA
24 trainers listed · 4 in Castro Valley · 15 open weekends · 23 rated 4.5+
Data verified October 18, 2026
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Pacific Therx PT Management Systems & Fitness
“I have been going to see Lisa Green at Pacific THE Rx on and off for fifteen years and she continues to offer top knotch, cutting edge treatment and service at the clinic is excellent.”
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Moxie Women's Fitness (Previously d'S Fitness)
- Environment
- Energy
“Lots of equipment to work with as well as different classes at all levels.”
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Strength den
- Decision
- Running
- Injury
“Denzel has done more to help in 3 months than 10 yrs of PT, chiropractors, water aerobics, exercise classes, acupuncture, chronic pain management groups, walking and on and on.”
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Fitness Inside Out of Marin
- Lymphatic Drainage
- Expertise
- Well-Being
“Her untiring determination paired with an amazing depth of knowledge achieved what I thought was not possible - today I am able to use my shoulder as if nothing happened!”
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Beyond Health & Fitness Studio
- Working Out
- Equipment
- Stretch
“Fred focused my fitness training on strengthening my hamstrings and core, and now I'm able to climb stairs without looking like someone who needs a knee replacement.”
This page lists 24 personal trainers and training gyms recorded for Castro Valley, CA. What each one says about its approach, its hours and its booking comes from its own website; ratings and quotes come from public reviews.
Area overview: Castro Valley, CA
4 of the 24 trainers we list are based in Castro Valley; the other 20 serve Castro Valley from towns including Oakland (10 mi), Mill Valley (29 mi) and San Ramon (8 mi). The trainers on this page are rated from 4.4 to 5.0 across 1,125 reviews; 11 have 50 or more reviews and 23 are rated 4.5 or higher. When students and parents rate these trainers on specific qualities, they most often praise quality (98%), professionalism (93%) and communication (82%). The topics that come up most in reviews of the trainers on this page are "equipment", "atmosphere" and "community". 15 are open on Saturdays and 6 on Sundays. 1 has a BBB rating of A or A+. Domain records put 14 websites of the trainers on this page at ten or more years old; the oldest dates from 1997. 2 offer a free trial or consultation and 3 list coupons or special offers. We have a website on file for all 24 of the trainers on this page; 18 publish a contact page; 21 list a public email and 8 take bookings online. We count these figures across the trainers on this page; distances are straight-line, and hours and prices change, so confirm the details with the trainer before you enroll.
Can I book a trainer listed for Castro Valley online?
8 of the 24 listings take online bookings. A first phone call is normal anyway, because a trainer wants to know what they are working with before putting you in a slot.
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Body By Pam
“I've always hated typical gyms but my wife has had a personal trainer for a few years and just loves it - and that's what I wanted: a welcoming, inclusive, non-judgmental one-on-one experience in a safe environment.”
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Kathy Klein Core Fitness
- Pilates
- Individual
“Several reasons I'm still a fan after all these years : I get individual attention in small group classes, I can do as much or as little as I need to - no judgment - I get personal advice for any particular muscle groups I need help with and Kathy m...”
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Castro Valley Fitness
- Bootcamp
- Health
“Mitch definitely got me stronger and introduced me to weight training which I knew nothing about and although I am not currently a client I would recommend his services!”
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Studio Thirty
- Energy
- Felt
- Personal Training
“Jake and JT take a more holistic approach to tune the body, and having been high-performance athletes in their past lives, they understand how to constantly keep the body guessing and working hard to help achieve fitness goals.”
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Body Mechanix Fitness
- Goals
- Learn
- Feel
“When we began to quarantine I figured I'd be without my trainer for a while, but Marlon was able to deliver the same quality workouts over zoom as I get in person.”
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Livfit Physical Therapy
- Expertise
- Exercise
- Skilled
“I now know that "there are many roads that lead to Rome", when I pay attention to my body I can find ways to treat it with the respect that it deserves thanks to Caroline.”
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Iron Lion Gym
“It doesn't matter if you are recovering from an injury, or you are already strong and want to redefine your capabilities - Iron Lion will make you a stronger human - and that will lead to you dominating life!”
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Grof Transpersonal Training
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The Well Studio
- Childcare
- Infrared Sauna
- Fitness
“I came for the yoga and have stayed for the amazing community, beautiful facility, fun classes, and most importantly, the sense of inclusion I feel every time I walk through the door.”
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Ownit Rx
- Shape
- Team
- Motivated
“This ego free environment has great programs that can be adjusted to accommodate anyone and I always look forward to coming here and fully enjoy myself while getting my butt kicked.”
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Impact! Kickboxing Fitness
- Self Defense
- Trainers
- Bags
“The instructors I had were so helpful and welcoming (Erik, Erika, Jinnia, Grace, and Kenny) and fellow students and front desk staff were kind and motivated.”
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Steve Paul Athletics
- Health
- Athleticism
- Motivating
“Great attitude, very knowledgable, knows how to adjust the training sessions based on needs and capabilities, and works you into his schedule even when your schedule changes week to week.”
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TNT Strength
“They have tried every method and every style, so the knowledge they have for exercise, the body, and nutrition is deep and they can find a style that suits your needs.”
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Live Oak Strength
- Results
- Evidence-Based
- Strength Training
“Most importantly, training with them once a week for the last couple months has been an essential part of my program following physical therapy that has helped me stay healthy and injury free at age 29 playing competitive soccer.”
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Clubsport San Ramon
- Options
- Courts
- Pool
“While it is a better gym in almost every way over 24 hour fitness, it's not worth nearly 9 times the price on a monthly basis and that's with the new year promotion where they are waiving the $300 initiation fee they normally charge.”
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Flex
- Cardio
- Yoga
- Equipment
“Early mornings see the place filled with predominantly elderly women who use Flex to sit on the equipment and socialize with each other while ignoring the circuit bell.”
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Bliss Fitness and Health
“Rebel Recess is my personal favorite since it is a good mix of cardio and strength, and provides ample time for goofiness and laughter depending on whatever creative workout Mona has thought up for the day.”
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Speed Power Strength Gym
- Youth
- Barbells
- Equipment
“SPS offers the best Bay Area gym experience for olympic & powerlifting & mobility training, plus phenomenal coaching and an ego-free and welcoming environment fit for seasoned lifters and total newbies”
Why these companies made our list
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