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DonJoy OA Full Force

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DonJoy OA FullForce Knee Brace

DonJoy’s lightest OA frame provides a snug comfortable fit, allowing maximum knee function.

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More Miles, Less Pain

The DonJoy OA FullForce is DonJoy’s lightest OA knee brace that off-loads the affected compartment of the knee while reducing ligament strain, allowing active patients to go more miles with less pain.

  • 3-Point Off-Loading mechanically shifts the painful joint loads from the degenerative compartment to the healthy compartment, while the hinge allows the ability to fine-tune the load.
  • 4-Points-of-Leverage is clinically shown to reduce ACL strain by keeping the knee in a stable position to minimize further cartilage damage.

What is Osteoarthritis (OA)?

Arthritis refers to more than 100 diseases that affect the joints and their surrounding tissues. Osteoarthritis, or OA, is the most common form of arthritis. The statistics on OA are staggering:

  • Nearly 21 million people in the United States have OA*
  • The incidence of OA is expected to increase even more as the U.S. population ages*
  • Over 7 million Americans are limited in their ability to participate in their main daily activities because of their arthritis*

The joint most often affected by osteoarthritis is the knee. Knee OA is caused by the degeneration or breakdown of articular cartilage that covers the ends of the bones that meet at the joint. Cartilage serves as a cushion between the bones, providing a smooth surface for the bones to move against each other. When the cartilage deteriorates the bones may actually be rubbing together. Your physician will often refer to this as “bone-on-bone” osteoarthritis.

*Arthritis Foundation

What is Osteoarthritis (OA) knee bracing and how does it work?

Knee braces are available that are specifically designed to treat OA. They stabilize the joint, reduce pain and help to build stronger muscles, which allows patients to return to the activities they love. Load redistribution and joint alignment Through a process called “off-loading” or shifting, OA braces relieve pain by redistributing the weight bearing load on the painful or affected compartment of the joint to the healthy or unaffected compartment. Increased function Studies have shown that wearing an OA brace can increase daily functions and decrease pain. Patients diagnosed with OA who wear a knee brace will generally feel better in the morning, be more active during the day, and rest more comfortably at night.

What to expect from a Osteoarthritis (OA) knee brace

  • Braces cannot cure OA and may not be right for everyone. However, it is a viable solution for many people. The ideal candidates are typically active people who are motivated to strengthen their muscles and willing to wear a brace to realize the benefits of this form of treatment.
  • Discuss treatment goals with your doctor and others on your health care team before you get a brace.
  • Don’t expect a brace to feel good from the start. It may take from a week to a month to get used to how the brace feels on your leg. Be patient. It took a long time for your knee OA to develop.
  • Bracing has come close to eliminating pain for some people with knee OA, while others experience moderate relief.

***NOTE: This item can take up to 2 weeks to ship***

Take the measurement of your thigh and calf 6" above and below your kneecap using a flexible type tape measure.  Use the diameter you measure here to choose your size.

    Size Thigh Knee Center Calf
    XS 13" - 15 1/2" 12"-13" 10"-12"
    S 15 1/2" - 18 1/2" 13"-14" 12"-14"
    M 18 1/2"- 21" 14"-15" 14"-16"
    L 21"- 23 1/2" 15"-17" 16"-18"
    XL 23 1/2" - 26 1/2" 17"-19" 18"-20"
    XXL 26 1/2" - 29 1/2" 19"-21" 20"-22"
    XXXL 29 1/2" -32" 21" -23" 22" -24

    Center Knee 1.Stand with your legs shoulder-width apart, legs slightly bent and leg muscles contracted.
    6 in Above 2. Measure up six inches from the center of your knee with a tape measure, as shown.
    Thig Circle 3. Measure the circumference of your thigh at the 6-inch mark, as shown.
    6 in below 4. Measure down six inches from the center of your knee with a tape measure, as shown. Then measure the circumference of your calf at the 6-inch mark.


5 3

DonJoy OA FullForce Knee Brace reviews

Happy customer
Have had this brace for three weeks. I have been in pain for eight months with arthritis and patella instability. after wearing this brace for three weeks I am absolutely amazed at the improvement in my knee. I can wear it all day. It is so comfortable. Thanks DonJoy. This is an amazing product! - Happy customer
I immediately experienced relief from pain when I put the knee brace on. After about a week with the knee brace, I found that the Lycra sleeve worn underneath and a couple strategically placed neoprene straps, I can wear the brace all day comfortably. Getting ready to do some skiing this weekend . . . Unthinkable without the donjoy brace. Great job Donjoy! - Gordon
I wore this brace everyday for my left medial meniscus tear for 6 months prior to meniscusectomy. After surgery have been wearing this brace for an additional year during exercise. I play tennis and run road races with this brace. It is very comfortable, durable. I feel better with the brace on than without it. I have gone back to have the straps adjusted after the first 6 months to be sure all was in place. I love this brace my doctor calls the 'unloader'. I tell everyone who asks about it.. Go Donjoy! Go! - medial

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Questions on DonJoy OA FullForce Knee Brace

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  • From Keith at 4/26/2012 8:38 AM
    • I have been wearing this brace for about 6 months and it is wonderful. My wife and I enjoy a trip to the beach each summer and I'm concerned about what effect, if any, the salt water and sand may have on this brace. Will the brace be okay if I rinse it well with fresh water (ie. - hose it off) each evening after we return from the beach?
    • Yes, definitely rinse off the brace with fresh water. Make sure to get into the hinges too, to get all the sand out. Let it dry and re-lubricate the hinges with a dry, teflon based lubricant. Most bicycle chain lubricants fit this description.
  • From Luke kyi win at 5/9/2013 8:49 PM
    • What are the same and different functions between OA nano and OA full force and OA adjuster3 for moderate osteoarthritis?OA nano can push from degenerated cartilage side to healthy cartilage side or not (meaning function like as OA full force knee brace)?
    • Hello,

      Here are the differences between our OA Knee Braces;

      OA Nano- lightest, newest brace, flexible, provides 10 degrees of correction
      OA Fullforce- designed for athletes, light brace, swooping thigh, 3 degrees of correction
      OA Adjuster-14.5 length, 10 degrees of correction

      Have a Great Day.
  • From ali at 10/5/2013 10:49 AM
    • I have this knee injury according to MRI report

      1. Grade I injury of lateral collateral ligament
      2. Grade II tear of posterior horn of lateral meniscus.

      Can you kindly suggest a brace so that i can start playing football please.

      waiting for your reply

    • Ali
      Thank you for contacting product support. DonJoy OA Full Force Knee Brace a great brace for you. It is lightweight and provides stability to the ligaments of the knee and you can get it to off-load the lateral side where your lateral meniscus tear is. If you have any other questions please do not heitate to contact us
  • From George Alexander at 10/9/2013 1:11 PM
    • I bought the Don Joy Fullforce three weeks ago. I am not sure its the right size. I used the chart and checked it twice. I bought ght size it noted. But the positionjof the pads on the sides seems a bit lower, more towards the lower part of the knee (towards the foot) rather than centered. Is this correct? Or do I possibly need one size larger?

    • George
      Thank you for contacting product support. It is possible that you are not putting the brace on correctly. The middle of the condyle pads should line up with the top of your kneecap. If you followed the sizing instructions on the BetterBraces website and measured six inches above and below the knee cap and took your knee circumference then you should have the correct size. Here is a fitting video that you can use to make sure that you are putting the brace on correctly.
      If the thigh cuff feels too tight it is malleable so you can pull it out a little as well.
  • From Debra Martin at 10/19/2013 6:52 AM
    • I am a disabled vet who received a Full Force brace for both legs. How can I tell the left from the right in a quick manner?
    • Debra
      Each brace has a swoop or curved edge in the thigh area. The swoop is on the inside of the brace, so when you put the brace on the swoop should be on the inside of your leg, if it is facing the outside of your leg you are putting it on the wrong leg. They should also have the size marked on each if you pull the inside liner from the top of the frame.
  • From ali at 10/30/2013 10:19 AM
    • I have bought the lateral right knee brace
      OA full force

      how it is diffeent from left or medial
      I mean by looking at brace
    • Ali,
      The adjustable hinge will be on the unaffected side. Yours is a lateral off loader, so the offloading hinge is on the medial side.

      As far as right and left are concerned you can tell by looking at the lower portion of the frame. Look at the arms that extend down from the hinges, you will notice one side is curved in and the other is straight down. The side that is curved goes on the inside of the leg. If you are looking straight on at your brace you will notice the curved portion on the right side below the hinge.

      Thank you for contacting DonJoy please let us know if you have any further questions.
  • From taggart at 1/12/2014 7:33 PM
    • I am 8 months post-op from acl reconstruction surgery. I am very active and do sports such as football, soccer, tumbling, wakeboarding, and skiing. I am wondering if the FullForce can hold up and protect the acl for all these sports? I am also looking at the Armor. How well will the Armor do? And which is better for the sports listed above?
    • The Armor would be a better option for Football and sking
  • From cindi at 3/23/2014 3:55 PM
    • I have osteoarthritis diagnosed after MRI. my ligaments are in good shape. I've been doing most of the exercises listed here since I first started w the pain late last year. I had fluid drained late November followed by a cortisone shot and another cortisone shot in December w minimal relief. I am on anti inflammatory meds (Tylenol Arthritis, ibuprofen and turmeric) and take a glucosamine/chondritin/MSM supplement and fish oil. The pain is localized to my inner knee. From reading the info here and the comments, I'm already doing a lot of it. I am also working on losing weight which I know will help.

      Can you suggest a a good knee brace that will allow me to continue umpiring fast pitch softball which requires squatting and squats to running? I do not want to give it up and my "teams" don't want me to either. Also, do you work with insurance?
    • Condi
      The DonJoy FullForce OA brace would be a good choice for you. You would want to get the medial compartment unloader for your knee and it will allow you to still do your umping. To get your insurance to cover this you will need a prescription from your physician and will need to go through either our insurnace department at 800-548-3370 or contact your local DJO sales rep by going to and looking up a rep
  • From Xavier at 3/29/2014 2:15 PM
    • Hi there:

      Just received my MRI results and I have patellar arthrosis (patella arthropathy). Basically arthritis caused by wear and tear. I'm 35 and play basketball 3 nights a week. Which brace would be BEST for my condition if I want to continue to play?
    • Xavier
      If you had joint compartmental arthritis the OA Full Force would be good for you, but if it is only the patella then you might get some relief from the Reaction Web Knee Brace The Reaction will hlp anterior knee pain by absorbing the forces place on your knee in the webing design of the brace.
  • From Linda W at 4/5/2014 7:11 AM
    • I got the DonJoy OA FullForce Knee Brace from my Orthopedic doctor. Fits good have some issues with it slipping unless I tighten the straps very tight which does cause some numbness. Question is: the inside material is making my leg very itchy. Are there some kind of pads that I can use for the 3 points that the brace lay against my skin? Don't want a full leg cover. Thanks.
    • The DonJoy OA Full Force has suede strap pads and liners, the only way to get something different is to go back to your doctors offic and see if the can get you different strap pads. We do have a sili grip pad that has silicone on the part that goes against you leg. You could also get a chamis anti-migration band that goes under the 4-5 strap. but the best way is to get the lycra undersleeve
  • From John M at 4/19/2014 7:28 PM
    • I have bone on bone contact on my right knee for many years, my cartilage was removed in a surgery years ago when that was the norm. I have quite severe OA but remain very active all these years. Which OA Full force should I order since I have no cartilage medial or lateral?
    • John
      Since you have bone-on-bone on both sides and the brace only unloads one side you can either decide which is worse the medial or lateral and get the brace for that side. The other option is to just get a ligament brace that will provide stability and support but doesn't unload any compartment. If that is the case I would go with a brace like the DonJoy 4titude Knee Brace
  • From Lucy at 4/20/2014 5:38 PM
    • I had surgery for ACL reconstruction and want to get a fullforce knee brace. I don't know if I should get a medial or lateral brace. What would be the appropriate brace? Thanks!
    • Lucy
      You do not want to order the OA Full Force, you want the Full Force Ligament Knee Brace here: for the ACL strapping
  • From Sofiane at 6/7/2014 1:11 PM
    • Hi,

      I am looking to buy a brace for my mother she has a severe OA but she still walk with a walking stick.

      Is OA Full Force the right choice for her? How can I choose between Lateral or Medial ?

    • The OA Full Force will be a good brace because it is light weight and low profile. Where is your mothers pain and OA? It will either be on the medila side(inner knee), or the laterl side(outer knee).
  • From Mary at 7/13/2014 9:43 AM
    • I have lateral compartment degeneration on both knees. I need to get two braces right and left. My question is the OA Fullforce low profile enough that the braces will not catch between the knees? I want to get back to being able to ride a bicycle and know that I can come to a stop and be stable on my legs. I can not do that right now.
    • Mary
      The DonJoy OA FullForce knee brace comes standard with a swooping thigh, which meas that you can wear abrace on both legs without the braces hitting each other.
  • From Jamie at 7/16/2014 5:49 PM
    • Looking for a brace for my wife who has had 2 medial meniscal surgeries on her left knee in 2 years. Now she has cartilage damage and bone on bone contact in the same knee on the medial femoral condyle. Which brace would be better for her? I was thinking about getting her the OA Full Force brace. Would that be a good one for her and do I get the medial off-loading option? She is quite active at the gym.
    • Jamie
      The DonJoy OA Full Force Knee Brace would be my reccommendation for her. and yes the medial compartment unloading
  • From Brian at 7/25/2014 12:35 PM
    • I was just told that I have a mild case of OA in my left knee. I am 35, I used to weigh just under 300 pounds, and got down to 170. Most of my weight loss was from running. At my peak I would do 4 - 7 miles a day during the week and more on the weekends. My pace got to an average of 8 minute miles. Since my knee pain started I have slacked off and gained some weight back. I do some exercise that has a lesser impact, but it does not keep the weight off as well.

      I was looking at the Web, Full Force and Nano. The Web is appealing cost wise, but while it says OA in the descriptions. All of the answers do not seem to recommend it. Which brace would be best suited for running 3 - 5 miles a day for someone with mild OA?

      Thank you
    • Brian
      right now I would suggest the OA Nano. It is very light wieght and is indicated for mild to moderate arthritis for very active people. However, on august 4th we are going to be launching a new OA Reaction Web Knee brace for those with mild OA. I am not sure when it will be offered on though. If you can wait a month it could be available and another option.

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