The most effective approach to knee arthritis combines regular exercise, weight management, and targeted pain relief. No single treatment eliminates the condition, but the right combination can significantly reduce pain, improve how well your knee functions, and delay or even prevent the need for surgery.
Exercise Is the Strongest Recommendation
Exercise is strongly recommended for everyone with knee arthritis, regardless of severity. That might sound counterintuitive when your knee hurts, but movement lubricates the joint, strengthens the muscles that support it, and reduces stiffness over time. Skipping exercise because of pain typically makes the condition worse.
A 2025 systematic review in The BMJ compared different exercise types head to head and found that aerobic exercise, things like walking, cycling, and swimming, is likely the most beneficial for improving pain, physical function, gait, and quality of life. The pain improvements were large and held up at both short-term and mid-term follow-up. Resistance training and aquatic exercise also help, but aerobic activity consistently ranked highest across outcomes.
The key is tailoring the type and intensity to what you can actually do. A physical therapist can design a program that progressively increases in difficulty as your knee tolerates more. Starting too aggressively often leads to flare-ups and quitting. Starting too gently means you won’t get the benefit. The sweet spot is exercise that challenges your muscles without sharply increasing joint pain for more than a couple of hours afterward.
Why Weight Loss Has an Outsized Effect
Every pound of body weight you lose removes roughly four pounds of pressure from your knee joint with each step. That math adds up fast. Losing 10 pounds takes about 40 pounds of load off your knees, and over thousands of steps per day, that translates to a meaningful reduction in cartilage stress and pain.
You don’t need to reach an ideal body weight to see benefits. Even modest weight loss, in the range of 5 to 10 percent of your current weight, can noticeably improve symptoms. Combining dietary changes with the exercise strategies above tends to produce better results than either approach alone, since exercise preserves muscle mass that supports the joint while the caloric deficit reduces the load on it.
Topical Pain Relievers Deserve a First Look
When you need medication for knee arthritis pain, topical anti-inflammatory gels and creams (applied directly to the skin over the joint) are a smart starting point. A large network meta-analysis pooling over 47,000 participants found that topical anti-inflammatories worked just as well as oral versions for improving knee function, with a dramatically better safety profile. In real-world data tracking more than 22,000 people per group over a year, topical formulations were linked to roughly half the risk of gastrointestinal bleeding compared to oral pills, and also showed lower risks of cardiovascular problems.
Perhaps more surprising: topical anti-inflammatories actually outperformed acetaminophen (Tylenol) for function and had fewer gastrointestinal side effects. Acetaminophen has long been considered the gentlest option, but the evidence now suggests it’s neither the most effective nor the safest choice for knee arthritis specifically. Oral anti-inflammatory pills remain an option when topical treatment isn’t enough, but they carry higher risks for your stomach, kidneys, and heart, especially with long-term use.
Injections: What Each Type Does
When creams and pills aren’t cutting it, injections directly into the knee joint are a common next step. The two traditional options are corticosteroid (steroid) shots and hyaluronic acid (gel) shots. Steroid injections reduce inflammation quickly, often within days. Hyaluronic acid acts as a lubricant and cushion inside the joint. In head-to-head comparisons, both provide similar modest improvements in pain and function at three and six months. Neither is dramatically better than the other.
Platelet-rich plasma (PRP) injections have stronger recent evidence behind them. A 2025 meta-analysis of 18 randomized trials with nearly 2,000 participants found that PRP significantly improved pain and function compared to placebo at both 6 and 12 months, with improvements exceeding the threshold for clinically meaningful benefit. A separate review of 35 trials found PRP consistently outperformed steroid injections over the mid and long term. The European Society of Sports Traumatology, Knee Surgery and Arthroscopy gave PRP a grade A recommendation for knee arthritis in 2024. The main drawback is cost: most insurance plans don’t cover PRP, and results depend heavily on the preparation technique. Higher platelet concentrations produce better outcomes, so the quality of the clinic matters.
Braces and Supportive Devices
If your arthritis is primarily on one side of the knee (most commonly the inner, or medial, side), an unloader brace can shift pressure away from the damaged area. A randomized controlled trial found that a custom-made unloader brace produced meaningful reductions in pain and improvements in function over one year, with potential cost savings from a societal perspective by reducing the need for other treatments.
Over-the-counter knee sleeves provide compression and warmth, which can reduce mild swelling and improve your sense of stability, though they don’t redistribute load the way an unloader brace does. Cushioned or supportive footwear, shoe inserts, and walking aids like a cane (held in the hand opposite your affected knee) also reduce joint stress during daily activities.
Supplements: Limited and Inconsistent Evidence
Glucosamine and chondroitin are the most widely used supplements for knee arthritis, but the evidence is genuinely mixed. Two large two-year trials produced conflicting results: an Australian study of 605 people found that the combination of glucosamine and chondroitin slowed joint space narrowing, while a U.S. study of 572 people found no difference between any supplement group and placebo. Two additional studies of chondroitin alone showed benefits for joint structure, but those findings conflict with the larger trials that found no effect for chondroitin on its own.
Whether these supplements have a real structural effect on cartilage remains uncertain. Some people report feeling better on them, and they’re generally safe, but the National Center for Complementary and Integrative Health notes the inconsistency across studies. If you try them, give it two to three months before judging whether they help.
As for anti-inflammatory diets, the theory is reasonable (certain eating patterns influence systemic inflammation), but direct evidence connecting dietary inflammation scores to knee pain hasn’t held up well. One study specifically measuring the inflammatory potential of participants’ diets found no associations with knee pain characteristics, quality of life, sleep, or fatigue.
When Surgery Becomes the Right Option
Joint replacement is indicated when you have progressive symptoms with severe degenerative disease and non-surgical treatments have failed to provide adequate relief. There’s no fixed timeline. Some people manage well for years with exercise, weight management, and periodic injections. Others reach a point where pain disrupts sleep, limits basic mobility, and doesn’t respond to conservative care.
On imaging, severe arthritis shows large bone spurs, significant loss of joint space, hardening of the bone surface, and visible deformity at the bone ends. But imaging alone doesn’t determine whether you need surgery. Plenty of people with severe-looking X-rays function well, and some with moderate imaging findings have debilitating pain. The decision rests on how much your symptoms affect your daily life after you’ve genuinely tried the non-surgical approaches above.
Total knee replacement has high satisfaction rates and typically lasts 15 to 20 years or more. Partial knee replacement is an option when damage is limited to one compartment of the joint, offering a faster recovery with a smaller incision. Both require several months of dedicated physical therapy afterward to regain strength and range of motion.