Do I need a knee brace? When bracing helps, and when it does not

A knee brace can be a very useful piece of kit. The right one, properly fitted, can take load off a worn part of the joint, make an unstable knee feel trustworthy again, or protect a repair while it heals. The wrong one, or the right one bought online in the wrong size, tends to end up in a drawer. This article explains which braces do what, where the evidence supports them, and why we fit them in clinic rather than leaving you to guess.

The short answer. A brace is a support for rehabilitation, not a substitute for it. It earns its place when it lets you do the exercise and activity that improve the knee.

What are the main types of knee brace?

Knee supports fall into four broad groups, and they do quite different jobs.

Offloading braces, often called unloader braces, are designed for osteoarthritis that mainly affects one side of the knee, most commonly the inner compartment. A rigid frame and adjustable straps apply a gentle corrective force that shifts some of the load away from the worn side and towards the healthier side. For the right person this can ease pain when walking and make activity more comfortable.

Functional ligament braces are hinged braces used after a ligament injury, most often to the anterior cruciate ligament. They aim to control the twisting and shearing movements that make an unstable knee give way.

Post-operative braces are hinged braces with adjustable stops that limit how far the knee bends and straightens. Your surgeon will usually specify one after certain operations, and we can fit and adjust it in line with the surgical protocol as part of your rehabilitation after surgery.

Sleeves and patellar supports are the soft supports most people picture. They give warmth, compression and a sense of security, and a patellar strap can help some people with pain at the front of the knee. They do not change how the joint is loaded in any meaningful way, which is fine as long as nobody expects them to.

Can a brace help knee osteoarthritis?

It can, for a specific group of people. NICE guidance on osteoarthritis is clear that exercise is the core treatment, and it advises against offering braces, insoles or supports routinely. It does support them where the knee is unstable or loaded unevenly, and where exercise on its own is not enough to keep you moving. Our page on arthritis explains the wider approach.

That is exactly the person an offloading brace is designed for. Typically their pain sits on one side of the knee, often with a visible bow in the leg. They want to keep walking, playing golf or getting round the garden, and the pain is stopping them doing the very exercise that would help.

A brace is at its most useful when it gets you moving enough for strengthening to work. If all it does is make resting more comfortable, it is not doing its job.

What an offloading brace will not do is reverse wear in the joint, and it is no guarantee of avoiding a knee replacement. We will be straight with you about what it is likely to change. If a replacement does turn out to be the right answer, a brace can still help in the meantime, and the same team will see you through recovery after knee replacement.

Do I need a brace after an ACL injury?

Opinion varies, including among surgeons. Some people with an ACL deficient knee find a functional brace gives them the confidence to return to sport, particularly skiing and sports that involve pivoting. The evidence that a brace reduces re-injury after an ACL reconstruction is limited, and what protects the knee most is strength, control and a properly staged return.

So if you have injured your ACL or are working through recovery after ACL reconstruction, we treat a brace as one option within your rehabilitation rather than the centrepiece of it. If the mountains are where your knee let you down, it is worth reading how skiers get hurt, and the habits that prevent it.

Rehabilitation first. Your quadriceps and hamstrings are the best knee brace you will ever own. An external brace works alongside them, never instead of them.

Is a soft knee support worth buying?

For many people it is a reasonable, inexpensive thing to try. If a sleeve makes your knee feel better on a long walk, there is no harm in wearing one. The trouble starts when a support becomes the plan for a knee that needs assessing.

Persistent swelling, locking, a knee that gives way, or pain lasting more than a few weeks all deserve a proper diagnosis first. A meniscus tear, runner's knee and early arthritis can feel similar and are managed very differently, and some people with hypermobile joints need stability from strength far more than from a sleeve. Our guide to knee pain is a good place to start.

Why does a knee brace need fitting?

Because a brace only works if it sits in the right place and you are willing to wear it. Legs vary a great deal in shape, and a rigid brace that is even slightly the wrong size will slide down the leg, pinch behind the knee or rub. Most people stop wearing an uncomfortable brace within a fortnight. Offloading braces also need their corrective force setting correctly, which is not something you can judge on your own at home.

At our brace fitting service a physiotherapist assesses the knee, confirms whether a brace is likely to help at all, and recommends the type. If it is the right call, they measure, fit and adjust it, and you leave knowing how to put it on, how long to wear it each day and when to leave it off.

Assessment before purchase. Part of the appointment is being told when a brace is not the answer, which saves you the cost of one that would not have helped.

Brace fitting at our Haslemere clinic is led by Theika Botterill, who fits the majority of our braces, and Nick Thornhill is training with Össur to fit alongside her. We supply and fit Össur braces, whose range covers offloading, ligament and post-operative bracing, and other makes are available where a different brace suits your knee better.

Fitting is priced on consultation, because the cost depends on the brace you need, and our fees page sets out our other appointment prices. If this is your first time with us, your first visit explains what to expect.

Where a brace fits into treatment

A brace is rarely the whole plan. Most of the people we fit are also working through musculoskeletal physiotherapy or a strength and conditioning programme, and anyone heading back to sport will get more from a brace paired with return to sport rehabilitation. Everything else we treat around the knee is gathered in our hip and knee section.

If you are wondering whether a brace would help your knee, call reception on 01428 642577 or book online, and we will tell you honestly whether it is worth it.