Skip to product information
Best Seller
Dr Lee Clark, Chartered Physiotherapist

Created and developed by Dr Lee Clark

Physiotherapist with a PhD in Biomechanics

Traditional braces support the knee, but the muscles keep weakening underneath. Pflexx was built to do both.

Pflexx Strength & Support Brace

Pflexx Strength & Support Brace

⚙️ Spring-loaded resistance technology

💪 Strengthens while you walk

🔒 Stays put, no sliding or bunching

 
Ships by Fri, Oct 16
United Kingdom flag
Fast GB Shipping
  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • iDEAL Wero
  • Maestro
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa
 
add_shopping_cart

-

Ordered

local_shipping

-

Order Ships

redeem

- - -

Delivered

Pflexx Strength & Support Brace

Absolutely miraculous product. My husband had a knee injury and couldn't put any weight on it! Within a few days of wearing the Pflexx Knee Exerciser he was back to work with full knee movement!

Imelda McCoy
View full details

Why is it different from other braces?

The PFLEXX® Strength & Support Brace uses spring technology to stabilise the joint while strengthening the muscles around the knee.

Why is that different?
Traditional knee braces support the joint, but can cause the muscles to be used less over time and become weaker, so the knee can end up less supported over time.

More than support.
The high-compression sleeve regulates temperature and boosts circulation to help reduce fatigue.

Designed for long term strength, not just temporary support.

Why Pflexx is better...

Traditional braces and sleeves take pressure off the joint, which feels good, but only while you wear them.

  Others
Reduces Joint Load
Builds Muscle
Unique Resistance Technology
Works while you move
Improves Performance

When Can It Be Used?

It can be worn anytime: during day-to-day activities or when exercising. Almost everyone can benefit from building the muscles around their knee.

It can be used:

  • Everyday walking and stairs
  • On your feet at work
  • Exercise and sport
  • Building leg strength over time

Your Path to Stronger, Steadier Knees

Our spring-powered knee brace features a dynamic resistance system that works with your body to reduce joint pressure and rebuild strength as you move.

Unlike stiff, restrictive braces, Pflexx is designed to move naturally with your knee, helping you move more easily, improve mobility, and build strength over time. Whether you’re walking, working, or getting back to activity, our biomechanics-backed design supports better movement with every step.

3 Levels of Resistance

Each order includes 3 different strength springs

  • White: 3.5kg of Resistance
  • Yellow: 5kg of Resistance
  • Black: 7.5kg of Resistance

They are interchangable depending on the level of support and resistance needed.

Made for the moments that matter

 

Every step up and down asks a lot of your knee. The sleeve keeps it supported, while the springs add light resistance each time your knee bends and straightens, so your thigh muscles do more of the work on every flight.

Getting up from a chair, the sofa or the car should not need a push off the armrest. The springs store energy as your knee bends and give a little back as you straighten, and over time the resistance helps build the leg strength that makes standing easier.

Whether it's the dog walk, the shops or a day out, Pflexx works the whole way round. The springs turn every stride into light resistance for your legs, and the breathable sleeve stays put without sliding or bunching.

Long shifts, standing all day, up and down ladders or stairs: you can't always rest your knee. Pflexx is slim enough to wear under work trousers and comfortable enough for a full day, supporting your knee while your muscles keep working.

If your knee feels like it might give way, you want to feel supported. The compression sleeve helps your knee feel steadier straight away, and the springs work the muscles around it, which are what help hold the joint steady.

Golf, gardening, the gym or a weekend walk: Pflexx is designed for getting back to what you enjoy. Start on the lighter white springs, then move up to yellow and black as you build strength, all in the same brace.

What Sports Can I Use This For?

The Pflexx Knee Brace can be beneficial to use in most sports, if your sport isn't listed below, use the contact us form and we will advise how it can be used.

 

The Pflexx Strength & Support Brace is ideal for runners looking to strengthen their knees, improve stability, and reduce the risk of injury. Its spring resistance technology activates key muscles like the quads and hamstrings with every stride, helping to support the joint and absorb impact. The compression sleeve boosts circulation, reduces fatigue, and aids recovery — making it perfect for both training and rehabilitation from running-related knee pain.

The Pflexx® Knee Trainer supports cyclists by strengthening the muscles that power and stabilise the knee during pedalling. Its built-in spring resistance engages the quads, hamstrings, and calves to promote balanced muscle activation and reduce joint strain. The compression sleeve improves circulation and helps prevent fatigue, making it ideal for both long rides and recovery from cycling-related knee issues like patellofemoral pain or overuse injuries.

The Pflexx® Knee Trainer is perfect for gym-goers looking to build strength, stability, and confidence during workouts. Its spring-loaded resistance activates key muscles around the knee — including the quads, hamstrings, and calves — during functional movements like squats, lunges, and leg presses. This helps support proper joint alignment, reduce injury risk, and enhance performance, while the compression sleeve boosts circulation and speeds up recovery between sessions.

The Pflexx® Knee Trainer is a great companion for hiking and trail running, where uneven terrain and prolonged activity can put extra stress on the knees. Its spring resistance strengthens the supporting muscles as you move, improving joint stability and reducing fatigue on long climbs or descents. The compression sleeve helps boost circulation and manage swelling, making it ideal for preventing injury and supporting recovery in demanding outdoor conditions.

The Pflexx® Knee Trainer supports horse riders by strengthening the muscles that stabilise the knee during riding, helping improve balance, control, and joint alignment in the saddle. The spring resistance activates key muscle groups with each movement, while the compression sleeve enhances circulation and reduces fatigue — especially useful during long rides or repetitive training. It’s ideal for managing knee pain, improving stability, and supporting recovery without restricting mobility.

The Pflexx® Knee Trainer is ideal for basketball and netball players who need strong, stable knees for jumping, landing, and quick direction changes. Its spring resistance helps activate and strengthen the muscles around the knee, improving joint control and reducing the risk of injuries like ligament strains. The compression sleeve supports circulation and reduces fatigue during intense play, making it perfect for both performance and recovery on and off the court.

The Pflexx® Knee Trainer supports golfers by strengthening the muscles that stabilise the knee during swings, walking, and time spent on uneven terrain. The spring resistance helps build joint control and reduce strain, especially during rotation and weight transfer. With added compression to boost circulation and reduce fatigue, Pflexx is ideal for managing knee discomfort and enhancing stability throughout your round.

The Pflexx® Knee Trainer is a valuable tool for winter sports enthusiasts, helping to build strength, stability, and resilience in the knees. Whether you're skiing or snowboarding, its spring resistance activates key muscles to support joint control during dynamic movements like turning, jumping, and landing. The compression sleeve enhances circulation and reduces fatigue in cold conditions, making it ideal for injury prevention, improved performance, and faster recovery on and off the slopes.

The Pflexx® Knee Trainer is perfect for racket sports like tennis, squash, and badminton, where quick footwork and lateral movement put high demands on the knees. Its spring resistance strengthens the muscles that stabilise the joint during dynamic changes in direction, helping to prevent strain and injury. The compression sleeve boosts circulation and reduces fatigue, making it ideal for maintaining knee health and performance throughout intense rallies and long matches.

FAQ's

Why is it different from other knee braces?

Unlike standard braces that only support the joint, Pflexx® uses built-in resistance to strengthen the knee and surrounding muscles — so it strengthens as well as supports.

Does it actually help strengthen my knee?

Yes — the resistance from the springs activates your muscles during normal movement, promoting strength and joint stability over time.

Can I wear it all day?

Absolutely. Pflexx is lightweight, breathable, and designed for long-term comfort whether you’re walking, working, or exercising. We recommend starting with a short amount of use and building it up over time for optimal results.

Can I use it while exercising?

Yes, Pflexx is suitable for low- to high-impact activity, walking, running, gym work and strength building.

How do I know which size to get?

Please refer to our size guide above the price at the top of the page.

Is it adjustable?

Yes, there are velcro straps that can be adjusted to get the perfect fit!

How do I wash it?

We recommend take the springs out of the knee brace then hand-washing and air-drying to maintain the integrity of the fabric.

How long does shipping take?

If you're in the UK it will take 3-4 days from purchasing the order to receive your item.

For other countries it is usually 5-10 working days.

  • 5 stars: 263 (88%)
  • 4 stars: 35 (12%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
A
Ann

Definitely the best! I was in extreme pain with inflamed arthritis knee pain, used my usual bamboo knee sleeves but not enough support, this one is brilliant. Has reduced pain greatly, such a good idea with the springs and knowing you have physiotherapist support.👍

A
Anonymous

I have tried a lot of braces. The best I had was a medical grade NeoG one. However I found the Pflexx better with the middle strength supports - particularly for walking longer distances - eg for golf.
Great job

A
Anonymous

I can honestly say that I can see a noticeable improvement in my knee problem since purchasing my pflex knee brace .

A
Anja Reifeneder-Köstlinger

The best I ever found for several sport!!

R
Raymond Longstaff

Bought it for my dad who had been struggling for months. He rang me after two weeks to say he had been for a walk without stopping to rest. That phone call was worth more than the cost it!

N
Nigel Braithwaite

Still going strong at week twenty. Still improving. This is a long term tool not a short term fix and I respect!

D
Darren Moseley

It got me back to the things that matter. Family walks, the garden, playing with the grandchildren without having to sit on the sidelines.

R
Reid Hollingsworth

Fits under work clothes, gym kit and casual clothes without showing. Versatile enough to wear in any context which is why I actually keep wearing it.

K
Kieran Saunders

The science behind it is sound and the results prove it. Muscle activation during natural movement is the most efficient form of rehabilitation there is.

J
Janet Holsworth

My recovery plan included this and it worked. Simple as that. Moving better, hurting less, living more.

H
Henry Whitfield

Cannot fault the product, the service or the results. All three were excellent.

E
Edward Griffiths

Knee replacement on one side, arthritis on the other. Pflexx helps with both differently but effectively. Impressive that one product covers both needs.

J
Jonathan Briggs

My physio keeps pushing back my discharge date because my progress keeps exceeding targets. I will take that as a win.

G
Graham Tilson

Used it as part of prehab before a demanding hiking season. Best season I have had in years in terms of how my knees held up.

N
Neville Stanhope

Pain free for the first time in three years. Three years. That deserves five stars on its own.

T
Trevor Hollis

The compression sleeve on its own would be worth buying. The springs make it exceptional.

N
Noel Brierley

Bought it with low expectations and high hopes. The hopes were met. Really pleased.

B
Ben Fairclough

Four years of dealing with this knee. Four weeks of Pflexx. Night and day.

J
Jack Sutton

My knee was the limiting factor in everything I wanted to do. It is no longer the limiting factor. That is what this product has given me.

B
Brodie Fairlie

Returned to swimming with no knee issues after eight weeks. The pool knee kicks were always uncomfortable before. Not anymore.

N
Neil Fairweather

The resistance engages muscles I had clearly been neglecting without realising. You can feel which muscles are working that were not working before.

B
Bert Crompton

Wore it through a busy Christmas period on my feet all day catering for family. Knee held up fine. Would not have managed without it.

D
Dave Holsworth

My knee had been bad for so long I had forgotten what normal felt like. Six weeks of this and I am starting to remember.

L
Lance Winterton

Would give it six stars if I could. Honestly the best product I have bought for my health in years.

F
Fraser Gillespie

My fitness has improved alongside the recovery because I can now train without the knee limiting me. Upward spiral rather than the downward one I was in.

T
Tristan Holbrook

Noticed that I was no longer favouring my good leg subconsciously. That is when I knew the confidence in my injured knee was coming back properly.

C
Colin Baxter

Two knee surgeries over the years and a permanent level of vulnerability in that joint. Pflexx has given me the best management of that vulnerability I have found.

N
Natalie Whitfield

My physio described the spring resistance mechanism and said it made clinical sense. Her opinion matters to me and it matched my experience.

B
Brandon Elsworth

The product is well documented on the website. Sizing guide is accurate. Instructions are clear. Product delivers. Full package done right.

S
Stephanie Norbury

Used it during a particularly intense work period where I was standing and walking a lot more than usual. Knee held up without complaint.

R
Rebecca Stanhope

My knee does not click anymore. Still slightly stiff in cold weather but the clicking is gone and the pain is minimal. Real progress.

C
Carol Wentworth

Yoga was difficult with a bad knee, especially balance poses. Pflexx has stabilised everything to the point where I can do a full class without modification.

O
Oliver Bennett

Joint has not swelled once in eight weeks. Previously it would swell after any significant activity. This has completely changed that pattern.

L
Lily Davenport

The product feels premium. Not like a medical device but not like a cheap sports gadget either. Well positioned in terms of quality and price.