Dr. Jason Won, PT, DPT FlexwithDoctorJay - San Francisco, California

M W.

I highly recommend the physical therapy and life fitness services provided by Dr. Jason Won! He has helped me immensely over the past few years.

I first sought him out after a debilitating back injury had me mostly confined to the floor. PT services covered by my insurance had no immediate appointments available. “Dr. Jay” setup a video consultation for me right away and immediately coached me on getting up and moving around without pain. After signing up with him, he created a custom rehabilitation and strengthening program for me attuned to my issues, symptoms and abilities. He uses an app that has a huge number of routines, stretches, exercises and workouts that he specifically configures for each patient to do on their own. I experienced significant improvement right away. Over time, the program evolved from mostly recovery to injury prevention strengthening as my symptoms waned. The degree of success one experiences with any such program is directly related to patient commitment and degree of participation. Dr Jay does not “cure” you, he provides you with useful tools to get yourself to where you should be. Properly applied, the recommended habits and exercises are designed to bring life-long benefits.

Justin C.

Dr Jason did a great job assessing and gaining an understanding of my physical issues. After a few months of working with him I began to see improvements in my stability and started getting good growth in the areas of my body we were targeting, as of today looking in the mirror my asymmetry is almost 90 percent gone and every week my lifts are getting more stable and strong, Not only is Dr Jay well educated & informed, but he lives what he talks about he actually pushes himself hard and trains vigorously with heavy compound weight training which made him stand out compared to some other physical therapist's, he will help you break through physical barriers but also help with mental barriers and beliefs that may be holding you back in your goal for physical vitality. Another thing that made him come across very trustworthy was he puts a emphasis on getting you to the point were you no longer need him, the goal is to treat the cause not just the symptoms and get you back to being self reliant again and I see that in his practice. Also he does not seem to be overly or unhealthily attached to any fitness dogma which I appreciated, he thinks every fitness tool and philosophy can have its place and one should strive to be well rounded instead of thinking one training modality is the end all be all. I highly recommend choosing Dr Jason if you are looking for a reliable physical therapist with good business integrity!

noel S.

I’ve had the pleasure of working with Dr.Jay for the past 8 months. He gives you all the tools to be successful but ultimately it is up to you to stay consistent and committed. He showed me how to track my macros which was a huge game changer for my health and goals. He also helped me work through a few tweaks where I normally would have stopped lifting in the past. This was also huge because I never really lost any of my gains. I may have slowed my pace a little while I rehabbed whatever body part or joint that was bothering me but ultimately getting through it without missing any days in the gym. He is not cheap but if you can afford it and can stay committed it will be worth it. He can help you achieve your goals almost completely pain free if you are willing to put in the work.

Barry C.

As a life time gym goer and someone who used to compete in powerlifting, I thought I knew it all. During my time working with Jay, he not only coached me in making my work outs pain free but also taught me and changed my way of thinking. He preached about longevity and how different muscles interact especially how certain muscles are overworked when some are lacking flexibility.

I came in with an injured shoulder but I came out stronger than when I was competing with a better way of thinking. I'm glad I worked with Jay as I will take his lessons to heart moving forward in my fitness journey.

Dave L.

I came to Dr. Jay after an ankle injury. I was initially quite worried, but he quickly diagnosed the issue, gave me exercises to aid my recovery, and gave me the confidence/reassurance to trust the plan, and my body's ability to heal.

Some of the exercises involved mild pain, but I stuck to them, and my ankle felt 80% better after ~2 weeks. It's now been 2 months, and the pain is pretty much gone.

In addition to helping with my injury, Dr. Jay coached me on how to structure my conditioning, to prevent injury in the future. He is excellent at giving practical feedback in a concise, and understandable way.

Not only is my ankle pain essentially gone, I feel stronger and more energized, since incorporating strength training into my life. Would highly recommend Dr. Jay to anyone who is looking to recover from an injury, and level up their health in general.

J C.

I got hurt on the job and got injuries in my upper extremities that limited me from a lot of daily activities. I was in pain and discomfort majority of the time.

I had already been following Dr. Jason on social media and saw his work and results. I wasn't getting any better or better results from the other therapies I was receiving so I decided to take matters into my own hands and contact Dr. Jason. It was the best choice that I made for myself and the only regret was that I should've reached out to him sooner.

Our initial consult was great. Dr. Jason is very knowledgeable and was also able to break down concepts into simpler terms. One of the main goals that I wanted us to work on was to fix my pain/discomfort, get me back to function where I can perform daily activities without pain/discomfort and or fear of hurting myself further somehow. Dr. Jason very quickly was able to assess where were my weaknesses and what we needed to work on in terms of strengthening and mobility.

Dr. Jason and I worked together starting last summer on mobility and gradually strengthening those weaker areas. As I gained more confidence and strength, I felt the pain/discomfort dissipate. We then continued to work on my overall fitness goals while continuing on all the work done for my injuries. I can now say that we did achieve my goal; I am not in the pain/discomfort like when I had felt where it limited me from my daily activities.

I highly recommend Dr. Jason to my friends and family, especially if I hear them say their therapies aren't working for them. Work with Dr. Jason and learn from him and you will see and feel the results.

Perry K.

I’ve been working with Dr. Jay for a year, and let me tell you—it’s been one of the most transformative years of my life! I’m in the best shape I’ve ever been, both physically and mentally. I’ve built a solid foundation of discipline and continue to work with him to push my progress even further.

From the start, Dr. Jay conducted an initial assessment, but more importantly, he asked me about my overall goal. Like most people, I gave him a target weight I wanted to reach. But he took it a step further and asked, “Why? Why do you want to be this weight? What does reaching that goal mean to you?” No one had ever asked me that before, and it made me reflect on the true purpose of my fitness journey. I realized that beyond just a number on the scale, my real goal was to become a stronger, healthier version of myself—for my family and loved ones—so they get the best of me every day.

Once we defined my goal, he created a customized workout plan for me. He didn’t just hand me a routine—he took the time to show me how to do each movement, explain what it does for my body, and provide an easy way to track my progress. All I had to do was follow the steps, day in and day out. Simple, right? Looking back, I’d say yes—but starting out was tough. The good thing is, Dr. Jay takes the guesswork out of it. All we have to do is show up, put in the effort, and trust the process.

Now, over a year in, I’m truly grateful for his guidance and support. I can honestly say I’m becoming a better version of myself every day, thanks to Dr. Jay and his personalized program. He’s already taught me sustainable habits that I can carry forward on my own, but I also know how much faster I progress with his coaching—which is why I plan to continue training with him for as long as I can.

Thank you, Dr. Jay!

Mike U.

Dr. Jason Won is deeply dedicated to his client’s health and well-being. His commitment to helping others live their best lives shines through in everything he does. I’m excited about working with him and exploring ways to address the challenges of aging.
Dr. Won’s expertise and passion for his work are truly inspiring, and I wouldn’t hesitate to recommend him to anyone seeking top-notch care.