Back to 25 Knee Clinic

Physiotherapist-led rehab program for knee pain relief, mobility, and strength

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The Back to 25 Knee Clinic is a complete online rehab video course designed to help you recover from knee pain using the Neuromuscular Physical Therapy (NPT) approach – a gold-standard rehabilitation technique backed by decades of research.

Knee Clinic is designed specifically for middle-aged and older adults with degenerative knee conditions like osteoarthritis. Licensed physiotherapist Mathieu Sonier will take you through the program from start to finish and show you exactly what you need to do—from the comfort of your own home, no equipment required.

Knee Clinic consists of 3 courses:

  • Knee Salvage (Basic)
    • Designed to help you get rid of pain by rebuilding your muscle strength and retraining your neuromuscular system
  • Knee Stabilize (Intermediate)
    • Focuses on improving your balance and stability to reduce risk of falls and injury, and as well as giving you the confidence to live life to the fullest
  • Knee Strengthen (Advanced)
    • Aims to help strengthen your muscles, bones and joints and slow down the progression of osteoarthritis to get you back to doing the things you love



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30-day risk-free guarantee

Overcome chronic knee pain

and regain the independence, freedom and strength of your younger years

There’s still hope!

The good news is that we have decades of research and knowledge on knee pain and how to manage and overcome it.

Since the beginning of time, the brightest minds in history have dedicated their lives to helping people treat and manage their pain.

With the right strategies and habits, overcoming pain is possible.

And that’s what you’ll get today with our physiotherapist-led Back to 25 Rehab Program.

We partnered with Mathieu Sonier, a physiotherapist with 11 years of clinical experience.

He is going to show you exactly how you can recover from knee pain with several simple yet effective exercises. No equipment needed. You don’t even have to leave your house.

Knee Clinic courses are designed to specifically address the root-cause of age-related chronic knee pain and joint degeneration.

As we age, we lose muscle mass and function. We also experience changes in our neuro-motor system, such as reduced sensorimotor coordination and lower body strength and stability.

Weakened or improperly functioning muscles place increased stress on our joints and cartilage as we move around, subjecting them to increased wear and tear and causing structural joint problems and pain.

Knee Clinic uses the Neuromuscular Physical Therapy (NPT) approach

to progressively rebuild strength in key muscle groups connected to the knee, and retrain your neuromuscular system.

With improved muscle strength and better muscle activation and coordination, we relieve pressure on the knee joints.

This in turn relieves cartilage decay, increasing joint stability and functioning and reducing knee pain.

NPT is different from traditional physiotherapy.

It focuses on quality over quantity

enhancing muscle activation through functional and proprioceptive training, rather than simply increasing reps to become stronger.

This in turn relieves cartilage decay, increasing joint stability and functioning and reducing knee pain.

This training has been proven

to relieve pain, improve function and biomechanics in the knees, as well as even reverse cartilage decay, which is the root cause of pain in conditions like osteoarthritis.

With just 6-8 weeks of consistent and deliberate NPT training, you can improve your osteoarthritis pain and reclaim your freedom and independence.

Living pain-free is possible

Rehabilitation is a journey—a lifelong process.
And to be honest: it won’t be easy.

But on the day when you finally find yourself doing the things
you could only dream of before, everything will be worth it.

You have to be patient
and take it step by step…

  • Course 1: Salvage

    The very first step of knee rehab is to help you find relief from pain. To do that, we will start by rebuilding strength in your knees and retrain your neuromuscular system for better muscle activation and coordination.

  • Course 2: Stabilize

    The next step is to stabilize the joint ever further, and to create even more neuromuscular adaptations for a stronger and more stable knee.

    We’ll also work to improve your stability and balance overall, which will reduce the risk of falls and injury, and help you improve mobility and regain the confidence to move about freely and easily in your daily life.

  • Course 3: Strengthen

    Finally, with reduced pain and improved stability, we will build upon that foundation to enhance your muscle, bone and joint strength.

    We will prepare you to return to activities that you might have stopped doing because of your knee pain.

    These exercises will also help to slow down the progression of conditions like osteoarthritis, and help you get to a truly pain-free life. And done consistently, these exercises will also help you to live independently and remain mobile into your 80s or 90s.

    Don’t wait until your knees cross the line of no return, where you may have to rely on a wheelchair or walking aid to get around.

    Who is Knee Clinic for?

    Knee Clinic is designed for people of all levels and experience. Whether you’re…

    A grandparent who wants to spend time with your grandkids but you have trouble keeping up with them…

    A former marathon runner who had to stop due to a knee injury three decades ago and you want to get back in the game…

    A retiree who dreams of traveling the world to see its wonders but your health and body is keeping you from taking the first step…

    If it’s painful knees that are holding you back from doing the things you love, this physiotherapy program can help.

    The important thing is that you have to make the choice to take the first step. Click “Add to Cart” below to purchase and start your Knee Clinic journey right away.

    Is Knee Clinic right for you?

    Knee Clinic is for you if:

    • You have been living with chronic knee pain (e.g. arthritis) and you’re looking for a way to manage it.
    • You want a safe, proven, non-invasive and non-pharmaceutical method to treat your pain (e.g. no pills, surgery or quack science).
    • You are not looking for a quick, short-term fix and understand that long-term results require time, effort and consistency.
    • You know that exercise is one of the most effective ways to manage pain, but you don’t know where to start.

    Do not start this program if:

    • You have a medical condition and are advised by your doctor to avoid exercising or raising your heart rate;
    • You have a recent injury and are still in the inflammation phase where doing the exercises might increase pain;
    • You are not sure what the cause of the pain or inflammation is;
    • You have loss of sensation or a neurological problem that affects your legs.
    • If you are unsure, please consult your doctor for approval.

    Our risk-free guarantee

    Listen, we get it…

    We know what it’s like to feel uncertain about making a purchase. You’re probably thinking, “Will this work for me?”

    Here’s the thing, we’re so confident that you’ll get amazing results from this that we’re willing to let you have access to the program for 30 days with a 100% money back guarantee.

    On one condition…

    You give this entire program your fullest and best attempt in good faith. That means you do the exercises every day, ask Mathieu any questions you may have, and hit all the milestones…

    Then at the end of 30 days, if you still genuinely feel that we did not deliver what we promised you, you will be entitled to a full refund.

    Let us know by emailing and you’ll get your money back.

    Do you remember what it was like when you were 25?

    For many people, 25 was a time when they felt invincible.

    The world was your oyster, full of opportunities and wonder.

    So many things to do, see and experience. You were only limited by the number of hours in a day.

    You could push your body to the limits, wake up the next morning like nothing happened. Any damage or illness would heal in a matter of days.

    Any damage or illness would heal in a matter of days.

    While we can’t reverse time or aging (yet)—we can slow it down significantly.

    Through proper recovery strategies and by building the right habits, you can live like you’re back to 25 once again.

    It all boils down to your personal choice: keep moving forward or simply drift along.

    You decide.

    Meet Mathieu Sonier

    Master of Health Sciences in Physiotherapy and Knee Clinic’s instructor

    Mathieu Sonier is a seasoned physiotherapist with over 11 years of clinical experience. He holds a Bachelor's in Kinesiology from the University of Moncton and a Master's in Physiotherapy from the University of Ottawa.

    Sonier specializes in musculoskeletal issues, sports physiotherapy, and sports massages, and has Mathieu Sonierworked with a wide range of clients from aged 10 to 80 to treat all kinds of knee conditions, including general knee pain, runner's knee, osteoarthritis, Osgood-Schlatter disease, patellar tendinits, ACL, MCL, LCL, and PCL strains, meniscus strains and tears, pes anserine tendinitis, patellar dislocation, and post-op care for knee surgeries including total knee replacements.

    Frequently asked questions

    Knee Clinic is a physiotherapist-led rehab program designed to help people suffering from osteoarthritis and other age-related knee conditions to strengthen their knees and get relief from pain.

    Knee Clinic consists of three courses:

    • Knee Salvage, to kickstart your recovery;
    • Knee Stabilize, to establish a resilient foundation; and
    • Knee Strengthen, to empower lasting knee health.

    No equipment is needed for Knee Clinic programs. All you need is your body and a yoga or exercise mat for comfort.

    Each course consists of a set of exercises which take 10-15 minutes to complete. The exercises are split into 3 parts: warm up, physiotherapy, and cool down.

    You'll repeat the exercises over about 4-6 weeks, and progress to the next course when you're ready. It takes an average of 12-18 weeks to complete all three courses in the Knee Clinic program.

    We generally do not recommend people who have undergone knee surgery in the past 4-6 weeks to do the exercises in Knee Clinic programs. People with knee injuries that are in the acute inflammation stage should also avoid starting Knee Clinic until the inflammation stage has passed.

    Once you have recovered enough that you can walk without significant pain, you should be able to start work on Knee Clinic, beginning with the first course, Knee Salvage. However, please check with your physician or primary care provider, as your individual circumstances may vary.

    Knee Clinic is designed for people of all ages and experience levels to follow along at their own pace. Whether you are a first-timer or a seasoned athlete, Knee Clinic is for everyone who experiences knee pain and want to strengthen their knees and get relief.

    You'll be able to access your courses any time you want, by logging into your HYDRAGUN account. You'll receive an email with instructions on how to create and log in to your account once you have purchased Knee Clinic

    You can purchase Knee Salvage, Knee Stabilize, and Knee Strengthen courses individually for US$40 each.

    You may also purchase a pair of courses for US$65, or the complete Knee Clinic bundle for US$79.

    Knee Clinic courses are sold on a one-time payment basis, so each purchase grants you lifetime access to the course.

    We are powered by We accept Visa and Mastercard credit and debit cards.

    We offer alternative payment methods such as Paypal at the checkout page for orders in the United States.

    You may hover over the country selector on the top right of this page to see the available domains. We accept the local currency of the available domains in the list.

    Note that not all products are available on all the domains.

    Every Knee Clinic purchase is covered by our 30-day love-it-or-return it guarantee. If after purchasing you feel that Knee Clinic isn't right for you, simply contact and we'll help to arrange a refund right away.

    We do not have in-person programs. However, we are partnering with licensed physiotherapists like Mathieu Sonier to offer a limited number of e-consultations to our customers.

    At present, e-consultations are available only with the purchase of our Complete Knee Rehab Bundle, which includes Knee Clinic and our other best-selling knee pain products. Click here to find out more.