Can you run after a total knee replacement?
A common question for patients undergoing a total knee replacement (TKR) is whether they can return to high-impact activities like running after surgery. While general advice typically discourages high-impact exercises, the question is not as straightforward as it may seem. Let’s take a closer look at the guidance surrounding running post-TKR, and explore the evidence behind these recommendations.
The general consensus on running after TKR
Orthopaedic professionals, including organisations like Arthritis UK and the American Academy of Orthopaedic Surgeons (AAOS), typically recommend avoiding high-impact activities such as running after a total knee replacement. The reasoning is that these activities can place excessive stress on the artificial joint, potentially accelerating wear and leading to premature failure of the prosthetic components.
The NHS is somewhat less specific, but it similarly advises patients to avoid extreme movements or sports where there’s a risk of falling. This caution reflects concerns over the durability of artificial joints under repetitive, high-impact loads.
Is there a scientific basis for avoiding running?
Despite these recommendations, the evidence to definitively prove that high-impact exercise like running will increase the wear of artificial joints is limited. Dr. J Hill, a sports medicine specialist at the University of Colorado, asserts that the belief that running harms artificial joints is more of a "legend" passed down through the years. According to Dr. Hill, there is a lack of substantial evidence to suggest that running on a total knee replacement leads to significant wear.
However, studies have shown some caution is warranted. For example, research from France indicates that high-impact activities might increase the risk of requiring revision surgery. Those who engaged in high-impact activities were three times more likely to need a second surgery compared to those who avoided such activities. In contrast, a Japanese study on hip replacement patients found that jogging did not significantly affect outcomes—yet, only a small percentage of those studied resumed jogging post-surgery.
Partial knee replacement: A different option
For some patients, partial knee replacement (also known as uni-compartment knee replacement) can be a better option than total knee replacement, particularly for those who want to maintain an active lifestyle. In partial knee replacement, only the damaged part of the knee is replaced, and important ligaments are retained. This often allows for a greater range of movement and better functional outcomes, enabling some patients to return to running, tennis, golf, and even skiing.
Patients who undergo partial knee replacement tend to report a more "natural" feel in the knee, which can make activities like kneeling or high-impact sports more feasible. However, not everyone is a candidate for partial knee replacement, and this should be carefully discussed with your orthopaedic surgeon.
Should you run after a total knee replacement?
For those who have undergone a total knee replacement, the decision to run should be made cautiously. While there are inspiring stories of patients returning to competitive running post-surgery, the general advice remains to proceed with caution.
Key factors to consider:
- Wear on the joint: Even if the evidence isn’t overwhelming, it’s logical that high-impact movements can increase wear on the prosthetic joint over time.
- Risk of revision surgery: Repeated high-impact activities may increase the likelihood of needing a revision surgery, which tends to be less effective than the original procedure.
- Individual factors: Every patient’s recovery journey is different. Some may tolerate moderate impact better than others, and factors such as overall health, weight, and the type of knee replacement surgery performed should be taken into account.
Conclusion
The consensus remains that high-impact activities like running should be avoided after a total knee replacement, at least until more conclusive evidence is available. While some studies suggest that it may not significantly harm the joint in the short term, the risk of wear and revision surgery makes it wise to opt for low-impact activities such as walking, cycling, or swimming.
For those keen on returning to running, it’s important to discuss your options with your orthopaedic surgeon. In some cases, partial knee replacement or alternative rehabilitation strategies may help you maintain an active lifestyle while reducing the risks associated with high-impact exercise.