Hip Arthritis Treatment in Boise & Nampa

What is hip arthritis?

Hip arthritis is osteoarthritis of the hip joint — a slow change in the whole joint, not just a worn strip of cartilage. The hip is a deep ball-and-socket: the head of the femur sits inside the acetabulum of the pelvis, lined by a rim of cartilage called the labrum and wrapped in a thick capsule. In osteoarthritis the articular cartilage thins, the bone underneath remodels and stiffens, the capsule tightens, and the muscles that control the joint quietly lose strength. Every one of those four changes contributes to symptoms, and three of them respond to training.

It is more common than most people assume and less inevitable than the phrase "wear and tear" implies. Among US adults aged 45 and older, roughly 27% show radiographic signs of hip osteoarthritis while about 9.2% have symptomatic disease — meaning most hips with visible changes on film are not the hips that hurt.^[1] Estimated lifetime risk is 28.6% for women and 18.5% for men.^[1] Men have a higher prevalence before about age 50 and women after it.^[1]

Clinicians divide it into primary hip osteoarthritis, where no single cause is identifiable, and secondary, where the joint had a head start: hip dysplasia, femoroacetabular impingement, a childhood hip condition, avascular necrosis, or an old fracture through the joint. The distinction matters because it shapes what we look for. A 58-year-old with a shallow socket and a lifetime of hiking the Boise Foothills has a different rehab problem than a 72-year-old whose hip stiffened over a decade of desk work.

What does hip arthritis feel like?

Hip arthritis usually feels like a deep ache in the groin that builds with walking distance and eases with rest, paired with stiffness in the morning that loosens within about half an hour.^[1] The location surprises people: it is a groin problem far more often than a "side of the hip" problem, and it commonly refers into the buttock, the front of the thigh, and sometimes the knee.^[1] Patterns we hear most weeks in the clinic:

• Deep groin or front-of-hip pain that comes on partway into a walk and settles once you sit down
• Morning stiffness that eases inside 30 minutes — unlike inflammatory arthritis, where it drags on much longer^[1]
• Trouble putting on socks and shoes, or clipping toenails, on the affected side
• Difficulty getting in and out of the car, which is a rotation task more than a strength task
• A shortening stride or visible limp late in a walk, and a shrinking "walking radius" — the loop around the neighbourhood that used to be routine
• Thigh or knee pain with a knee that examines and images normally
• In more advanced disease, pain at rest or at night, and pain that no longer respects the activity that caused it

Two things are worth flagging. Pain directly over the bony point on the outside of the hip is usually gluteal tendon or bursal irritation rather than joint arthritis — a different problem covered on our hip pain and impingement page. And stiffness that lasts well over an hour, in several joints, with swelling or systemic symptoms, is not the osteoarthritis pattern and needs a physician.

What causes hip arthritis, and who gets it?

Hip osteoarthritis comes from an accumulation of load, joint shape, and biology rather than a single cause. The risk factors with the most consistent support are advancing age — particularly past 60 — female sex after menopause, obesity, a genetic and family history component, and occupations involving heavy physical labour and repeated loaded bending.^[1] Joint shape sits alongside them: dysplasia leaves the femoral head under-covered, and impingement-shaped hips pinch the labral rim at end range.

Body weight is the risk factor most worth acting on, because it is one of the few that moves. The 2019 American College of Rheumatology and Arthritis Foundation guideline strongly recommends weight loss for people with hip or knee osteoarthritis who are overweight or obese, noting that losing at least 5% of body weight is associated with meaningful clinical change and that benefits keep increasing at 5–10%, 10–20%, and beyond.^[6] The same guideline strongly recommends exercise for hip osteoarthritis, without prescribing a single "best" type.^[6]

What we would gently push back on is the idea that using the hip caused this. Muscle weakness and reduced activity are as often consequences of an arthritic hip as causes of one, and the spiral runs downhill fast: the hip hurts, you walk less, the glutes weaken, the joint tolerates less, you walk less again. Interrupting that loop is most of what rehab does.

Does exercise actually work for hip arthritis?

Exercise helps hip arthritis, but the effect is smaller than the fitness industry implies and the honest version is worth hearing before you commit to a program. The most recent Cochrane review, updated in July 2026, pooled 18 randomised trials and 1,368 people with hip osteoarthritis and concluded that compared with no treatment, usual care, or limited education, land-based exercise probably produces small improvements in pain and physical function — improvements the authors judged unlikely to be clinically meaningful for many patients. Compared with an attention-control or placebo intervention, exercise may have little to no effect on pain and only slightly improve function.^[2]

A 2023 systematic review and cumulative meta-analysis puts numbers on the same picture. Immediately after treatment, exercise therapy improved pain by a standardised mean difference of −0.38 (95% CI −0.55 to −0.22) and function by −0.31 (95% CI −0.49 to −0.11); at six to nine months the effects were still present but smaller, at −0.23 for pain and −0.29 for function. The authors' own summary is that exercise therapy for hip osteoarthritis is effective, but the effect is small and not clearly clinically worthwhile.^[3]

The most uncomfortable trial in this literature is the second card. Both groups improved meaningfully, but the active program was no better than the sham, and mild adverse events were more common among those receiving real treatment.^[4] It is a single 102-person trial with a specific protocol, and it does not show that exercise is useless — but it does show that a generic hands-on hip program is not automatically better than attention and reassurance.

So why do guidelines still strongly recommend exercise for hip osteoarthritis?^[6] Because the comparison that matters is not exercise against a perfect alternative. It is exercise against long-term analgesics, against injections with their own modest and temporary effects, against surgery, and against doing nothing while the joint gets stiffer and the muscles get weaker. Exercise carries a low harm profile, it treats the strength and capacity losses that imaging cannot see, and it is the one option that also improves what you can do rather than only what you feel. Small and real still beats large and imaginary — and it is why we measure your walking distance, your rotation, and your sit-to-stand rather than asking whether the hip "feels better."

Can physical therapy delay a hip replacement?

Yes — in the best trial available on the question, exercise therapy postponed hip replacement by roughly two years. Norwegian researchers randomised 109 people with symptomatic and radiographic hip osteoarthritis to a 12-week supervised exercise program plus patient education, or to patient education alone, then followed them for six years with a 94% response rate. Cumulative survival of the native hip was 41% in the exercise group versus 25% in the education-only group (hazard ratio 0.56, 95% CI 0.32–0.96), and median time to hip replacement was 5.4 years versus 3.5 years.^[5]

Two honest caveats. This is one trial of 109 people, and participants could not be blinded to whether they were exercising, which matters when the outcome is partly a shared decision about surgery. And postponement is not prevention — most participants in both groups eventually had the operation. What the trial supports is a specific, useful claim: starting structured exercise early buys time, and time in a joint you still own is worth having.

It is also worth saying clearly that a total hip replacement is one of the most successful operations in modern orthopedics, and nothing here is an argument for suffering through a hip that has stopped responding. The sequence we use is simple: give conservative care a genuine trial with measured outcomes, and when the measurements stop moving while pain at rest and at night keeps rising, that is the moment to have the surgical conversation — not a failure of rehab.

When does hip pain need a doctor rather than rehab?

Most hip arthritis can start with a physical therapy evaluation, but a few presentations need medical assessment first. Contact a physician promptly, or go to urgent care, if any of these describe you:

• Hip pain with fever, feeling unwell, or a hot, swollen joint — a joint infection is an emergency
• Sudden inability to bear weight after a fall, especially with a shortened or externally rotated leg — that is a fracture presentation
• Deep groin pain in someone on long-term corticosteroids, with heavy alcohol use, or with sickle cell disease — the pattern that raises the question of avascular necrosis
• New hip or thigh pain with a history of cancer, unexplained weight loss, or night pain that is constant rather than position-dependent
• Groin pain that came on after a rapid increase in running or walking mileage — in that setting we screen for a femoral neck stress fracture before loading the joint
• Prolonged morning stiffness lasting well beyond an hour, in multiple joints, with swelling — an inflammatory arthritis pattern that needs blood work

None of these are common. All of them are worth ruling out on day one, which is part of what an evaluation is for.

What to expect at your first visit

1. The functional history. Where the pain sits, how far you can walk before it starts, what stiffness does in the morning, and which specific tasks — socks, stairs, the car, the yard — have quietly disappeared from your week.
2. A measured hip exam. Rotation, flexion and extension range compared side to side, hip abductor and extensor strength testing, gait observation, and the tests that separate joint arthritis from lateral hip tendon pain and referred back pain.
3. A red-flag screen. The list above, plus a review of medications, other joints, and general health — so anything that needs a physician gets identified on day one rather than week six.
4. A frank conversation about expectations. What the evidence supports, what it does not, and what a realistic three-month outcome looks like for your hip specifically. No cure language, no scan-based doom.
5. A plan with numbers in it. Two to four exercises you can actually do, a walking dose for the week, and the measurements we will retest so progress is visible. Most hips are seen every one to two weeks over 8–12 weeks rather than three times a week indefinitely.