Daniel Bernal Training
“I highly recommend working with him if you're looking for real results and a personal trainer who genuinely cares.”
Best Personal Trainers near Diamond Bar, CA
3 of these trainers are based in Diamond Bar; the others serve Diamond Bar from towns including Upland (12 mi), Placentia (8 mi) and Anaheim (11 mi).
3 open 24/7 · 14 open weekends · all 15 rated 4.5+
Data verified October 18, 2026
Kims Power Fitness
“Beyond fitness, she's also a certified life coach who genuinely cares about her clients' overall well-being, making her sessions both physically and mentally rewarding”
Fitness Advantage
“I've been working out here for 15 years and love the people a ND atmosphere.”
Purple Yoga
“I really value feeling like I'm always growing and improving even though I have stayed in the Blue level.”
Fit Gym
“This gym is one of my favorites—not because it's flashy or like the big-name fitness centers, but because it has everything you need.”
Corona Hills Boxing & Fitness
“I highly recommend Corona Boxing Gym to anyone looking to improve their fitness, learn boxing, or take their training to the next level.”
This page lists 15 personal trainers and training gyms recorded for Diamond Bar, 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: Diamond Bar, CA
The 15 trainers on this page are rated from 4.6 to 5.0 across 1,431 reviews; 11 have 50 or more reviews. The topics that come up most in reviews of the trainers on this page are "atmosphere", "equipment" and "skills". 3 are open around the clock; 14 are open on Saturdays and 9 on Sundays. Domain records put 4 websites of the trainers on this page at ten or more years old; the oldest dates from 2010. 3 offer a free trial or consultation; 1 is family- or locally-owned and 3 list coupons or special offers. We have a website on file for all 15 of the trainers on this page; 10 publish a contact page; 8 list a public email and 4 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.
Why are some trainers here not in Diamond Bar?
3 of the 15 listings are based in Diamond Bar. The rest come from other towns within 15 mi. Distances are straight-line, and plenty of trainers take clients from further out than their address suggests.
Axioms Fitness
“Amazing gym, I highly recommend if you're looking to lock in and get after it they have amazing equipment!”
No Limit Personal Training
“They remember my name which makes me feel special (hah), and they give guidance/feedback to ensure you're maintaining proper form or pushing yourself just a little more - something I'm very appreciative of.”
Z FIT
“I've been looking for a gym that is suitable for me, my schedule, and just somewhere where I feel comfortable.”
Fitness Underground
“This gym has a lot of powerlifting and machine space, the bathrooms and changing areas are clean, and the community and vibes are among the best I've experienced at powerlifting gyms.”
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Crossfit Reverb
“Since joining in August 2024, I have experienced significant improvements in my cardiovascular health, physical strength, and overall confidence.”
Core Precision Megaformer Pilates
“The instructors all know how to guide you, adjust your stance/pose and so encouraging to work those muscles just waiting to get worked…I've already noticed a difference in the few months I've been going.”
Placentia's # 1 Fitness
“Most of that is by training under Stewart Knorr, watching calorie intake and portion control”
Crossfit Fortem
“They take the time to push you to your own personal limits and they know your limits because they are pay attention.”
Tribe Fitness
“I have been going to Tribe for the past 8 months and they have provided me with the tools I needed to reach and expand my fitness goals.”
Why these companies made our list
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