You scaled back. You stopped lifting. You switched to the pool or the stationary bike. You figured you were protecting your joint. Here’s what I need you to know: the research doesn’t support that advice. In fact, it points in the opposite direction.
The “Wear and Tear” Story Is Outdated
For a long time, osteoarthritis was explained as a mechanical problem — cartilage wearing down like a brake pad. The logical conclusion: less load, less damage. It made intuitive sense. But science has moved on.
We now understand OA as a metabolic and inflammatory condition — one that involves the entire joint, including the surrounding muscle, bone, and fluid. Load is not the enemy. The wrong kind of load, or no load at all, is what causes problems.
Here’s a fact that surprises most people: cartilage has no blood supply. It gets its nutrients through movement — specifically through the compression and decompression that happens when you load your joints. When you stop moving and stop loading, cartilage doesn’t get protected. It gets starved.
What the Evidence Says
The two leading international bodies on osteoarthritis research — OARSI and the ACR — both classify progressive resistance training as a Grade A, first-line treatment for knee and hip OA. That’s the same evidence level as medication.
Strength training reduces pain
Not marginally — meaningfully. Multiple high-quality clinical trials have demonstrated significant pain reduction from progressive resistance programs.
Stronger muscles protect your joint
Your quadriceps are your knee’s primary shock absorbers. When those muscles are weak, every step and every stair puts more stress directly on the joint. Strengthening them is one of the most powerful things you can do.
Avoiding exercise makes things worse
When you stop using your muscles, they atrophy. Weaker muscles mean less joint support, more compressive force, and more pain. The very thing you’re trying to prevent gets worse.
Higher loads work better than lower loads
Studies consistently show that progressive resistance training outperforms light exercise — more strength, less pain, better function. The GLA:D program, validated in over 10,000 patients worldwide, is built entirely on progressive resistance and movement training. Participants consistently report less pain and reduced reliance on pain medication.
Cartilage has no blood supply. Load avoidance doesn’t protect it. It starves it.
“But Won’t I Damage My Joint?”
Multiple studies have looked specifically at whether supervised resistance training accelerates joint damage in people with OA. The answer, consistently, is no. When the loading is supervised, progressive, and technically sound, it does not worsen cartilage or accelerate OA progression. Some research suggests it may actually slow progression.
The key words are supervised and progressive. That’s why working with a qualified physical therapist matters — not because you can’t load, but because the dose and technique make all the difference.
Modification, Not Avoidance
There are times to reduce load and intensity — but the key word is reduce, not stop:
- Acute flare: When the joint is hot or swollen, dial back intensity temporarily
- Post-surgical: Shortly after joint replacement, follow your surgeon’s timeline
- Mechanical issue: If there’s a structural problem that needs addressing first
Modification based on what your body is telling you is smart. Permanent avoidance is not. Clinical judgment matters — but that’s an argument for supervision, not for avoiding the stimulus entirely.
What We Do at Better Bones Rx
At our clinic, we work with active adults managing OA every day. Our approach is built around supervised progressive resistance training — not despite the OA, but because of it.
We start with a thorough assessment, build a program that challenges your muscles appropriately, coach form and technique in real time, and monitor how your joint responds along the way.
If you’ve been told to avoid weights and you’re not sure what to do, come talk to us.
Dr. Wendy Green is a Doctor of Physical Therapy, BoneFit™ certified clinician, and one of only three licensed Onero™ providers in San Diego County. She is the owner and clinical director of Better Bones Rx and Phyzique Multisport, inside the Ecke YMCA in Encinitas, CA.