Ultimate Performance Personal Trainers Los Angeles, Brentwood
5.0★★★★★ · 432 Google reviews · 20 photos
Personal trainer · Los Angeles, CA
Ultimate Performance Personal Trainers Los Angeles, Brentwood at a glance
Customers report that trainers provide customized workout plans, monitor nutrition and sleep, and enforce proper form to improve strength and body composition. The facility is described as clean and organized, with staff noted for their accountability and supportive communication. While the service is considered a significant financial investment, some low-rated reviews cite unprofessional front desk interactions, missed appointments, and a stressful atmosphere as recurring concerns.
Google rating: 5.0 out of 5 from 432 reviews (99% five-star).
Reviews on this page: 431 Google reviews (425 with written comments, 4 with photos).
Owner responses: the business replied to 65% of reviews.
Most recent review: June 17, 2026.
Service: Athletic Trainer serving Los Angeles, California.
Data from Google, last updated October 26, 2026.
Photos
Customer reviews
5.0
★★★★★
432 reviews on Google
5★426
4★2
3★0
2★0
1★3
Reviews from Google, shown as published (original wording, unedited).
ML
Moin LalaLocal Guide · 6 reviews
★★★★★
I’ve been training with Killian for for about 10months and I couldn't be happier with my progress. He really takes the time to understand my personal goals and build customized workouts that actually push you safely. I was skeptical about my ability but Killian believed in me and help with my growth and progress. His knowledge about work our forms are amazing. I am getting stronger with his help. Amazing trainer and a friend.
Response from the owner · 4 months ago
Hi Moin, thank you so much for sharing your experience with us! We’re delighted to hear how happy you are with your progress over the past 10 months with Killian—your consistency and commitment are clearly paying off in a big way. Thank you again for trusting us with your goals. We’re proud to be part of your journey and look forward to supporting you as you continue to progress!
I've had an excellent experience working with Killian and the team at Ultimate Performance Brentwood.
Before starting, I had tried various workout programs and approaches, but what stood out about Ultimate Performance was the level of accountability, structure, and personalization. Killian took the time to understand my goals, created a plan tailored to me, and consistently kept me on track.
The atmosphere in the gym is professional, welcoming, and focused. Every session has a purpose, and the coaching extends beyond the workouts to nutrition, lifestyle habits, and overall health.
I've made significant progress toward my goals and have developed a much better understanding of how to train and eat effectively. Killian's knowledge, attention to detail, and commitment to his clients' success have made a tremendous difference in my journey.
I would highly recommend Killian and Ultimate Performance to anyone serious about achieving lasting results.
Price assessment: Great price
Services: Service not listed
Response from the owner · 4 months ago
Hi, thank you so much for taking the time to share your experience with us! We’re delighted to hear how positive your journey has been at Ultimate Performance Brentwood and truly appreciate your thoughtful feedback. Thank you again for your kind recommendation and for trusting us with your journey. We’re proud to have been part of your progress and look forward to supporting you as you continue to build on these results!
Amazing experience. The team at UP in Brentwood is A++ and they care about your goals and progress.
Killian is a phenominal trainer and has surpassed my expectaitions for what a trainer should be. He is encouraging, helps guide you towards your goals, and genuinly cares about his clients which made my fitness journey that much more enjoyable.
The gym itself is organized and everyone operates at an effiecient level that creates a gym culture unlike anywhere else.
If you are looking to achieve your fitness goals with a professional team this is the place.
Response from the owner · 6 months ago
Hi Teddy, thank you so much for your amazing review! We’re thrilled to hear how positive your experience has been with the UP Brentwood team. It’s fantastic to know that Killian’s encouragement, guidance and genuine care have exceeded your expectations and made your fitness journey both enjoyable and effective. We’re also glad the gym environment and team culture stood out to you. Thank you for the recommendation, we’re proud to support your goals and excited to continue working with you!
I have been training with Killian for the past 6 weeks, and highly recommend working with him! He is patient, encouraging, and incredibly attentive to proper form and technique. In a short amount of time, I have seen major improvements in my body awareness, cardio endurance, and ability to lift heavier weights. He has also helped me better understand how my body works (what it needs to recover, how to lose fat, and how to perform at my best). I've always pushed myself to stay active and work out regularly, but training with Killian has made my fitness journey so much easier, less overwhelming, and something I actually look forward to! His approach is structured and professional, and the results speak for themselves!
Response from the owner · 10 months ago
Hi Rohini, thank you so much for sharing this! It’s fantastic to hear how much progress you’ve made in just six weeks. Killian will be thrilled to know his guidance and structured approach have made your fitness journey easier and more enjoyable. Huge credit for embracing the process, keep up the amazing work!
Overall the most positive gym experience of my life! It took a little while to find the right trainer for me but once I did the experience got even better. My takeaways - great team at Brentwood, yes it's a big investment but so worth it, & a more holistic experience than I thought it would be.
Price assessment: Reasonable price
Services: Nutrition consulting
Response from the owner · 10 months ago
Hi Frances, thank you for sharing this! We’re so glad you found the right trainer and had such a positive experience at UP Brentwood. It’s great to hear the holistic approach and supportive team made it worth the investment. Here’s to even more progress ahead!
I had an exceptional experience working with Ben McKnight at UP!
From day one he delivered a clear plan, precise coaching, and consistent support that genuinely moved the needle for me in understanding what it means to train my body to get measurable changes in my strength.
Every session felt intentional, challenging, and built around my goals.
The difference between working out alone and working with someone who actually knows how to push you safely and correctly is huge.
Investing in this process has been one of the best decisions I've made for my health. Period.
Highly recommend working with Ben at UP!
Response from the owner · 11 months ago
Hi Michele, thank you so much for sharing your experience with Ben and the UP team! We’re thrilled to hear how impactful your training journey has been. Thank you for your trust and strong recommendation. We look forward to supporting you as you continue to build on this success!
There truly aren't enough adjectives in the English language to describe how great of an experience it has been to be a part of U.P. This place has definitely transformed my physical and mental health to the point where I look forward to working out. Having a trainer like Faith, who pushes me and doesn't let me get away with any BS, but is also super caring and supportive has been a massive motivator for my success and in just a short amount of time. I would never have been able to get to this point on my own so I owe a lot to her and the overall U.P. team. I highly recommend U.P. to everyone i know, informing them that no matter who their trainer is (Faith or someone else), they are going to have an amazingly impactful experience and they are going to want to keep on going because everyone that works here is awesome.
Response from the owner · 11 months ago
Hi Martin, thank you so much for sharing your experience with us! We’re thrilled to hear how transformative your time at UP has been—both physically and mentally. Knowing that you now look forward to training is exactly what we aim to achieve. Thank you again for your trust and recommendation. We’re excited to see you continue to thrive and achieve even more!
If you're looking for the best personal training in LA, this is it. While expensive at first glance, the quality, quantity, and attention you get is unparalleled. Working with Reggie has been transformative to my life: helping me find healthy relationships with nutrition, training, and overall improving my health while I enter my 30s. Reggie has done a great job at monitoring my nutrition, making suggestions on meals, adjusting plans with precision, and providing variety in workouts. In addition, he's gone above and beyond in teaching me how to continue this on for life, educating me along the way, and explaining the intricate details of all the experiences .
The gym is top notch: clean, tons of equipment. Everyone in the gym contributes to the professional, respectful, and friendly vibe.
UP gets my highest recommendation to friends and family
Price assessment: Reasonable price
Response from the owner · 11 months ago
Hi Rob, thank you so much for sharing your experience at UP Los Angeles. We’re thrilled to hear how transformative your journey has been and how Reggie’s guidance has helped you build healthier relationships with nutrition and training. Thank you again for your trust and recommendation. We look forward to supporting you as you continue your fitness journey!
Ask for Killian! I've been training with him for quite some time and it's been the most effective workout I've done yet. My goals are specific: Keep me safe, teach and maintain proper form & technique, and keep increasing weight load as I adapt. He does all of that and keeps me accountable to increasing what I can lift. Importantly, he is professional, friendly, and reasonable. I don't do fads diets, or don't tolerate trainers who treat staying healthy as a crash course/temporary fix with unrealistic goals. This is a permanent way of life for me and he is really supportive of that!
Price assessment: Reasonable price
Services: Service not listed
Response from the owner · a year ago
Hi Kristine, thanks so much for the great feedback! It’s fantastic to hear how well Killian’s approach aligns with your long-term goals. His focus on proper form, progression, and sustainable habits really makes a difference, and it’s great to see how much you’re enjoying the journey!
I have trained there for nearly seven years and it is a life changing experience. The training is extremely personalized, tailored, and supported by a knowledge based approach focused on overall health, nutrition and the achievement of real time goals. I have trained with Chris Weatherholtz (who is an incredibly talented and dedicated professional) for a long time and am now training with Octavian Shepherd in the Brentwood location. Octavian is an amazing trainer and motivator. He leads by example and provides the perfect balance of pushing one to his/her limits while being very aware of tracking progress and capacity. This combination allows personal and physical growth to occur whiteout injury and with a clear line of sight of what happens when one is thriving towards personal success.
Response from the owner · a year ago
Hi Arturo, thank you for your continued trust and commitment over the past seven years. It’s been a privilege to support your journey, and we’re so pleased to hear how impactful your experiences with both Chris and Octavian have been. Your progress is a reflection of your dedication, and we’re proud to be part of it.