Osteoarthritis and Exercise: Why Movement Is Still the Best Medicine

Osteoarthritis is the most common joint disease in the country, and it’s only becoming more common as the population ages. The Centers for Disease Control and Prevention reports that 21.3 percent of US adults had doctor-diagnosed arthritis in 2024. Osteoarthritis is the most common form of that broader arthritis category, affecting an estimated 33 million US adults on its own, most often in the knees, hips, hands, and spine.

Here’s the part that surprises a lot of people: one of the most consistently recommended treatments for osteoarthritis isn’t a medication. It’s exercise.

Quick Answer

Osteoarthritis is a degenerative joint disease involving changes to cartilage and other joint tissues, most often in the knees, hips, hands, and spine. The 2019 American College of Rheumatology and Arthritis Foundation guideline gives exercise a strong, first-line recommendation for managing OA, alongside weight management and self-management education. No single exercise type has been shown to work better than another, and even modest, consistent activity can reduce pain and improve joint function. The key is choosing the right type and intensity for your joints, which is exactly where a physical therapist can help.

Key Takeaways

Exercise is a first-line, strongly recommended treatment for knee, hip, and hand osteoarthritis.
No single type of exercise works best for everyone; aerobic, strength, mobility, and aquatic exercise can all help.
Starting gradually matters, especially if you’ve been inactive.
Certain symptoms (locking, instability, sudden swelling, fever) mean it’s time to get evaluated rather than push through.
A physical therapist can tailor an exercise plan to your specific joints, symptoms, and goals.

What Is Osteoarthritis?

Osteoarthritis is a degenerative joint disease involving changes to the cartilage that cushions the ends of the bones, along with other joint tissues including bone, the joint lining, and surrounding ligaments. As cartilage wears down, bones can move less smoothly against each other, which makes movement painful and can gradually reduce mobility.

Common symptoms include:

Pain during or after daily activities
Pain at rest or that disrupts sleep
Decreased range of motion
Decreased strength around the joint
Swelling or inflammation
Tenderness to touch
Stiffness, especially in the morning or after sitting for a while

Osteoarthritis often creates a discouraging cycle. Joint pain makes people less willing to move, but inactivity itself tends to increase stiffness and pain, and it also affects the health of other major body systems, including the heart, lungs, and metabolism. Breaking that cycle is where treatment starts.

What the Guidelines Actually Say About Exercise

The 2019 American College of Rheumatology and Arthritis Foundation guideline, the leading clinical guidance on OA treatment in the United States, gives a strong recommendation for exercise as a first-line treatment for knee, hip, and hand osteoarthritis, alongside weight loss for people with overweight or obesity and self-management or self-efficacy programs. The guideline also conditionally recommends balance exercises and yoga, and strongly recommends tai chi for knee and hip OA.

Notably, research reviewed for the guideline found that no single type of exercise outperforms the others for OA. Aerobic exercise, strength training, and mixed programs all show measurable benefit for pain and function. That means the right exercise for osteoarthritis is largely the one that fits your specific joints and limitations, and that you’ll actually do consistently. Exercise is one part of a broader treatment picture that can also include weight management, self-management education, assistive devices, and medication, depending on the person.

Why exercise helps:

It supports joint function and reduces stiffness. Regular movement helps a joint move through its available range of motion, and physical activity more broadly supports overall joint function, which is part of why joints often feel stiffer, not better, with prolonged rest.
Stronger muscles support the joint. Strengthening the muscles surrounding a joint, like the quadriceps for the knee, helps absorb load and stabilize movement, which can reduce pain.
It supports weight management. Extra body weight significantly increases the load on weight-bearing joints like the knees and hips. For people with knee OA who are overweight or have obesity, even modest weight loss can reduce pain and improve physical function.
It counteracts stiffness. Regular movement through a joint’s full range helps maintain flexibility that inactivity tends to erode.

Exercise Options That Work Well for Osteoarthritis

Since no single exercise type is superior, the right mix usually blends a few categories:

Low-impact aerobic exercise: walking, cycling, and swimming raise heart rate without high joint impact.
Aquatic exercise: water supports body weight and reduces joint load, making it a well-tolerated option for people with significant pain or stiffness.
Strength training: building strength in the muscles around an affected joint, using resistance bands, bodyweight, or light weights, is a core part of most OA treatment plans.
Range-of-motion and flexibility work: gentle stretching and mobility exercises help manage stiffness.
Tai chi: strongly recommended in current guidelines for knee and hip OA, combining slow movement, balance, and body awareness.

Precautions: When to Modify or Get Guidance First

Exercise is strongly recommended for osteoarthritis, but that doesn’t mean any exercise, at any intensity, is automatically safe to start on your own. A few things worth knowing:

Start low and progress gradually, especially if you’ve been inactive. A sharp increase in activity can aggravate a joint rather than help it.
Some discomfort during exercise is common and expected, but pain that sharply worsens, persists well after activity, or is significantly different from your usual symptoms is a reason to scale back and consider an evaluation.
See a doctor or physical therapist promptly if you notice: a joint that locks or catches, a joint that gives way or feels unstable, sudden or significant swelling, redness and warmth around the joint (which can signal infection or another condition, not just OA), or fever alongside joint symptoms.
Certain joints and OA severity levels benefit from a guided program, rather than a generic exercise routine, particularly if you have significant deformity, a history of joint replacement, or other health conditions that affect how you should exercise.

If you’re not sure where to start, or you’ve tried exercise before and it made things worse, that’s a sign to get an individualized plan rather than push through on your own.

Where Physical Therapy Fits In

A physical therapist’s job is to take the general guideline, “exercise helps,” and turn it into a specific plan for your joints, your pain level, and your goals. That typically includes:

Assessing which movements and muscle groups need the most support
Building a progressive strength and mobility program that won’t aggravate the joint
Teaching proper movement mechanics to reduce unnecessary joint stress in daily activities
Adjusting the plan as your symptoms and function change over time

To find out more about how our physical therapy services can help with osteoarthritis, call or text us at 949.716.5050.

Frequently Asked Questions

Is exercise safe if I already have osteoarthritis pain?

For most people, yes. Current clinical guidelines give exercise a strong recommendation for OA, and inactivity tends to make stiffness and pain worse, not better. The key is choosing the right type and intensity for your joints, starting gradually, and getting guidance if pain worsens significantly or a joint feels unstable.

What is the best exercise for osteoarthritis?

Research hasn’t found one exercise type that clearly outperforms others. Low-impact aerobic activity, strength training, aquatic exercise, and tai chi are all supported by current guidelines. The best choice is usually the one that fits your affected joints and that you can do consistently.

Can exercise reverse osteoarthritis?

Exercise doesn’t rebuild lost cartilage, but it can meaningfully reduce pain, improve joint function, and slow the disability that often comes with inactivity. It’s considered a core part of managing OA rather than a cure.

How many people have osteoarthritis?

An estimated 33 million US adults have osteoarthritis, according to CDC and Arthritis Foundation data. It’s the most common form of arthritis and most often affects the knees, hips, hands, and spine, and that number is expected to keep rising as the population ages.

When should I see a doctor instead of just exercising through OA pain?

Seek evaluation if a joint locks, gives way, swells suddenly or significantly, feels warm or red, or if you develop a fever alongside joint symptoms. Those can signal something beyond typical OA and shouldn’t be managed with exercise alone.

Sources

Centers for Disease Control and Prevention, National Health Interview Survey, arthritis prevalence data (2024)
Centers for Disease Control and Prevention / Arthritis Foundation, osteoarthritis prevalence estimate (approximately 33 million US adults)
Kolasinski, S.L., Neogi, T., Hochberg, M.C., et al. (2020). “2019 American College of Rheumatology/Arthritis Foundation Guideline for the Management of Osteoarthritis of the Hand, Hip, and Knee.” Arthritis Care & Research.
American Family Physician (2021), summary of updated ACR/Arthritis Foundation osteoarthritis management guidelines

This article is for educational purposes and isn’t a substitute for individualized medical advice.