Stairs taken one at a time, hikes you've stopped planning, a knee that announces the weather — arthritic knees respond to strength. The evidence on this is unusually clear.
Medically reviewed by Dr. Thomas Kleingartner, PT, DPT · August 2026
Knee osteoarthritis is the most common form of arthritis, causing pain, stiffness, and difficulty with stairs, walking, and standing. Exercise therapy is its most evidence-backed treatment: high-quality trials show strengthening reduces pain and improves function, and physical therapy outperformed steroid injections at one year in a randomized trial. RISE Physical Therapy treats knee arthritis one-on-one in 45-minute sessions in Boise and Nampa, Idaho, with no referral required.
Knee osteoarthritis (OA) is a gradual change in the whole joint — cartilage thins, the bone underneath remodels, the joint lining can become irritated, and the muscles around the knee weaken. It's often described as "wear and tear," but that framing misleads: joints aren't tires with a fixed tread. Cartilage is living tissue that adapts to sensible loading, and weakness, previous injury, and body weight influence symptoms at least as much as age.
The disconnect between pictures and pain is worth repeating: X-ray severity predicts symptoms poorly. People with "bone-on-bone" imaging can hike comfortably; people with mild changes can be miserable. That's not an argument that the arthritis isn't real — it's evidence that strength, movement quality, and load management are levers you can actually pull.
Knee OA builds slowly, which makes it easy to shrink your life around it without noticing. Book an evaluation if you recognize:
A hot, red, swollen knee with fever, or a knee that locks completely, deserves a physician evaluation first — those point away from routine OA.
Exercise is the most consistently supported treatment in all of knee OA care. A Cochrane review of 45 randomized trials with 4,607 participants found high-quality evidence that land-based exercise reduces pain and improves physical function, with benefits persisting after programs end.[1] The comparison patients often ask about was tested directly in a randomized trial published in the New England Journal of Medicine: patients who received physical therapy had less pain and functional disability at one year than those who received glucocorticoid injections.[2]
Honest expectations matter: exercise doesn't regrow cartilage, and effect sizes are moderate — pain reduced, function improved, not erased. But it's the only treatment that also builds the reserve that makes daily life easier, and if a knee replacement is eventually the right call, entering surgery stronger improves the outcome on the other side. Nothing about starting PT closes the surgical door; it just often makes the door unnecessary.
Arthritic knees need progressive strength delivered at the right dose — enough to adapt, not enough to flare. That dosing is exactly what 45 uninterrupted minutes with the same Doctor of Physical Therapy makes possible.
Strength, stairs, and walking tolerance get baselined — your progress is tracked in function, not just pain.
Hands-on care eases symptoms while graded quad and hip loading starts at the dose your knee tolerates.
Progressive capacity work returns stairs, hikes, and standing days — with an independent plan you keep.
One-on-one knee arthritis care from a Doctor of Physical Therapy — no referral needed in Idaho.
Thomas specializes in lower-extremity orthopedic and post-operative rehabilitation. He earned his Bachelor's in Kinesiology at Washington State and his Doctorate of Physical Therapy at South College in Knoxville, Tennessee. Meet the full team →
