Calibrated Custom Fitness - Los Altos, California

Sue C.

I’ve been working with Jason over 13 years, and I can’t recommend him highly enough. When I first started, I had significant issues with my neck, discs, back, shoulders, and arms. At one point, the numbness ran from the side of my neck all the way down my arm and to my foot, making everyday tasks incredibly difficult. Jason designed a customized training program that built up my strength, stability, and mobility without leaving me exhausted.

One of the reasons I continue to train with Jason is his extensive knowledge about all body types and the specific challenges each can face. He understands how the body works in ways that are truly remarkable. For someone like me, with no previous background in mobility or movement, Jason has made me so much more aware of my body and taught me how to work with it in a sustainable and mindful way.

On top of his expertise, Jason brings a great sense of humor and positivity to every session. He’s more than just a great trainer — he’s someone who genuinely cares about his clients and their progress. Our journey together has been incredibly rewarding, and I’m thankful for his support over the years.

If you’re looking for a trainer who can guide you through a long-term movement journey, whether you’re an athlete or a complete beginner like I was, Jason is the one you want by your side.

Jasmine D.

Jason, Creed, Carl, and I all worked in the same clinic together years ago. Their work ethics and dedication to their craft is insane. They walk the walk, and do their homework. We worked together to get the same patients better.

As a chiropractor, I helped patients get out of pain, while they customized their personal training to help them move better with their specific injuries. They have a particular training to help patients with pain/ injuries to move safely during their training. They are very careful on not reinjuring the patients.

I've also trained with them personally, and they have many variations of exercises to help make the progression of exercises easier and effortless.

I would highly recommend to work with them. They are the real deal because they have dedicated their young whole lives to personal training, and nothing else. That's real and true passion for the love of their work.

Jason shard with me once that he was once an unfit kid. So, through that painful experience, out came man you see today! I'm so proud of these guys.

Nil B.

My 13-year-old son had an excellent experience working with Carl at Calibrated Custom Fitness. As a committed club baseball player (catcher and pitcher), my son wanted to "get stronger" so he could be a better player. At this age, the club team coaches were beginning to use weights during training and I became concerned when my son complained of low back and shoulder pain after practices. I sought out Carl and he did a detailed assessment of my son at the gym. We both appreciated the way he explained things to us, focused on core strength before diving into weights, and increasing my son's overall body awareness. I trusted Carl. He is very knowledgeable, thoughtful, and tried in earnest to customize every movement to my son's unique strengths and weaknesses. He took videos of various movements and showed side by side comparisons with pro-athletes to help motivate him. He sent emails explaining things we could do at home. I was grateful for the way he was able to connect with my son and explain things on his level. My son progressed rapidly and I truly believe this was attributable to Carl's knowledge and training style but also his ability to motivate my son. After 10 sessions, his pains went away and he was able to incorporate fundamental techniques in his sessions with his team.

Steve A.

I do personal training with Jason Agrella. I've been working with him for about nine years. Something Jason and I have in common: we love working out but are prone to injury. Jason has a passion for helping his clients achieve their fitness goals while greatly reducing their risk of injury. I refer to Jason as a magician - whatever my ache and pain, he knows how to eliminate or greatly reduce it. As someone who logs a lot of running mileage, I often have muscle tweaks. After I workout with Jason, my aches and pains are gone or at least are less severe. I feel strong when running the days after seeing Jason. The body feels put together and the runs feel effortless.

I highly recommend Jason and Calibrated Custom Fitness.

Leigh A. Q.

I cannot speak highly enough of Creed, he is hands down the best personal trainer. He’s kept me fit (and sane) for over 5 years - Ironman training, pregnancy & postpartum, and I’m back running faster than before I had my baby. Also worth mentioning I’ve been injury free because of his thoughtful planning. He is the real deal, a true expert in his field. He’s a great guy that makes the training enjoyable.

John B.

Calibrated Custom Fitness has my highest recommendation. I have been working with Carl for several years for chronic back and knee pain. He has done wonders for my mobility and I no longer deal with chronic pain. Carl is a good listener and has a wealth of information about health and fitness. He developed a fitness program that pushes me but also understands what I need and my current limits. I feel like I had a good workout every time I leave but also feel energized and in better spirits.

Bob K.

I've been working with Carl on my golf fitness for about 12 sessions. His understanding of the body and how to make it move a golf club are awesome. His approach is take a step back to take a leap forward and it works. My driver speed is up to 115 max from 110 already. Also I'm finding I have fewer nagging injuries too! Very happy with Carl and the whole setup!

Ben M.

My wife and I have been working with Jason for years and we truly cannot say enough good things about him. He has everything you want in a trainer: professionalism; unparalleled expertise on all things health and wellness related; and a kind, friendly approach that will appeal to anyone. He knows just how hard to push you so you are always advancing, but not so much that you risk injuries, or become too intimidated to continue. He is open-minded, creative, and collaborative.

For people who are pregnant or thinking of becoming pregnant, know that he helped train my wife throughout her pregnancy and afterwards. Without a doubt, he is the reason that my wife was able to follow her own birth plan-the doctor was skeptical that she would be able to deliver without a C-section given the size of our baby and because she had spent 2 days in labor before beginning to push. But Jason had helped prepare her-both her core and her stamina-and she was able to deliver our kid safely in under 2 hours. The doctor called her the 'best pusher' she's ever seen-and that is because of Jason.

In other words, he is perfect. Jason is also just a funny, smart, and interesting guy to be around-we have enjoyed not just working with him, but becoming his friend. We trust him with our life, and you will, too.