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    Knee Replacement and Walking: Striking the Right Balance

    September 19, 2016

    One bit of confusion I run across regularly is how much walking to do after a total knee replacement. The answer to the question is actually fairy complicated because it has to do with a combination of a couple of variables, but one of those variable is of the utmost importance.

    That variable is swelling. Controlling swelling is king when it comes to rehabbing a knee replacement. If you can control the swelling, then you can recover must faster. So, what then causes swelling after a total knee? Well, I am glad you asked: Joint irritation is the answer, and what causes joint irritation – weight bearing! I am not talking about being overweight – but the mechanical loading that comes from gravity plus your body weight on the “new” knee; especially in the first several weeks after surgery. In Biomechanics we call this concept the Ground Reaction Force, which is the compression force that is concentrated on a weight bearing joint during the impact when your heel strikes the ground. So, when we say weight bearing that means standing and walking. Weight-bearing on a knee replacement with-in the first 12 weeks tends to produce selling. The body produces swelling and inflammation when the newly formed tissue is stressed repeatedly under the load of our body weight plus gravity and ground impact. However, after a total knee replacement one of the most important things to do is walk – thus the dilemma. You have to get walking – not only for the strength in your knee, but also for the function of your body including other muscles, the digestive system, the cardiovascular system (i.e. to avoid blood clots) and your heart and lungs. So, remember, yes it is very important to get walking right after your knee replacement but you do want to strike the right balance and not do too much!

    I do occasionally see clients who have not progressed their walking like they should and they tend to have a set of problems that include weakness and lack of knee extension. However the opposite problem is actually more common, I mostly see patients that have progressed their walking far to quickly. When that happens they come in with a knee that is excessively more swollen than it needs to be – so much more that the swelling limits their bending range of motion and ironically making it harder to walk.

    So what is the solution? Well to have a balanced attack. To know how much walking might be too much and how much walking might be to little. To have a regulated walking schedule and to recognize that just because it feels “ok” at that moment doesn’t mean that it will be “ok” in the next 12-24 hours. That is the real trick because the swelling doesn’t always show up right after the irritating event. The body usually takes some time to produce the response to the irritation. I have seen it take as long as 72 hours, so just because after your walking activity you feel fine, may not mean your in the clear, the best advice is to wait 12-24 hours after the possible irritating event to see if you are actually in the clear. My suggestion – if you do have any questions about how much walking to do after total knee replacement and your struggling with swelling limiting your ROM, then you maybe doing too much walking. Be sure to ask an experienced physical therapist to help you “problem solve” your dilemma if that is the case.

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    Reid Clinic

    1250 Upper Hembree Rd Suite A
    Roswell, Georgia 30076

    phone: (678) 667-3435
    Fax: 404-201-2080

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    Reid Kelley | Reid Clinic
    Phone: (678) 667-3435 | Fax: 404-201-2080
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