What a supervised FAI programme actually involves

Conservative management for FAI rests on three pillars: structured physiotherapy, activity modification, and — for selected patients — an intra-articular corticosteroid injection. Each plays a distinct role, and all three are typically co-ordinated from the outset rather than tried one after another.

Structured physiotherapy

The exercise programme is supervised and progressive, not a generic list of stretches. The focus falls on the muscles that stabilise and offload the hip: the gluteus maximus, gluteus medius, deep external rotators, and adductors, combined with core and lumbo-pelvic control work (in plain terms, the muscles that link your lower back, pelvis, and hip so they move as a unit rather than letting the hip joint absorb excess force alone). Improvement is typically felt within 12–24 weeks of consistent effort.

One point physiotherapists address early is the 'stretch reflex' — the instinct to push stiff joints to their end range. In FAI, aggressive or painful end-range hip stretching can actually worsen impingement by jamming the ball against the acetabular rim. A well-designed programme avoids this entirely.

Activity modification

This does not mean stopping all activity. It means swapping deep-range loading movements — heavy squats, lunges, leg presses, twisting sports — for low-impact aerobic alternatives such as walking, swimming, or cycling with the saddle raised.

Intra-articular injection

Where pain control is a limiting factor, a guided corticosteroid injection into the hip joint reduces intra-articular inflammation. It also serves a diagnostic purpose: meaningful relief after injection confirms that the pain originates inside the joint rather than from surrounding soft tissue. Relief typically lasts weeks to months; no more than two or three injections are generally recommended.

What conservative care can realistically achieve

The most rigorous evidence available comes from a 2025 multilevel meta-analysis of 21 randomised controlled trials involving 1,799 patients. Across pain and function measures — including validated hip disability scores and pain rating scales — it found no statistically significant difference between a structured physiotherapy programme and hip arthroscopy. Surgery did produce marginally higher scores on two scales (the Harris Hip Score at 12 months and the iHOT patient-reported score at 24 months), but the numerical gap was small enough that its clinical meaning for most patients is limited.

Surgery-avoidance figures add further weight to the conservative case. Studies suggest that 70–82% of patients following a targeted physiotherapy programme avoid surgical intervention at two-year follow-up, with mid-term data at 4.5 years or more showing that improvements in pain levels and daily activities are well maintained. It is worth noting that these figures come from observational and mixed-methodology studies rather than pure randomised trials, so patient selection may influence the numbers somewhat — they reflect real-world pathways rather than a controlled experiment.

Physiotherapy also produces statistically significant functional gains compared with no treatment at all — a finding that matters because it establishes the benefit as real, not incidental. For a meaningful proportion of patients, a well-executed conservative programme is a sufficient long-term solution in its own right, not simply a box to tick before surgery.

What conservative management cannot fix

Conservative management works around the underlying bony abnormality, not through it. The cam bump or pincer overcoverage that defines FAI is anatomically fixed from adolescence — no amount of strengthening or activity modification reshapes bone. Physiotherapy redistributes load and reduces provocative movement patterns; it does not alter the structure causing impingement.

Beyond the bony morphology, three further limits apply:

• Labral tears cannot heal conservatively. A corticosteroid injection reduces intra-articular inflammation and may relieve pain for weeks or months, but it does not regenerate torn labral tissue. Overloading the hip on the back of injection-derived pain relief risks compounding the damage.
• Articular cartilage loss cannot be reversed. Where delamination or cartilage thinning is already present, conservative care can manage symptoms effectively but cannot restore the joint surface.
• Severe labral loss can create structural instability that is beyond the reach of physiotherapy alone, regardless of how well-executed the programme is.

None of this makes conservative management a poor choice — for most patients it remains the right first step, and many achieve durable benefit even in the presence of some structural damage. What it does mean is that understanding these ceilings helps patients and clinicians recognise when the pathway should progress, rather than persisting with an approach that has reached its limits.

Who is most likely to do well without surgery

Several features, when present together, suggest that a structured non-surgical programme is likely to be sufficient — and that the gains are likely to hold.

The most important single factor is the state of the joint surface. Patients whose imaging shows no significant articular cartilage damage tend to respond well to physiotherapy and maintain those gains over time; once the cartilage is substantially compromised, the balance of evidence shifts toward surgery.

Time since onset matters alongside this. Those presenting within roughly 18 months of symptoms starting consistently show better conservative outcomes than those who have lived with hip pain for considerably longer before seeking help.

Structural severity also plays a role. A milder cam or pincer deformity — reflected in a lower alpha angle on imaging and a lower Tönnis radiographic grade — means less mechanical provocation for the programme to work around. Patients in this group, typically younger and without early osteoarthritic change, are the ones most likely to achieve durable benefit.

Finally, how the programme is carried out matters. Patients who engage with a supervised, progressive exercise plan — building load gradually through gluteal and deep hip strengthening — do measurably better than those managing independently with stretching alone.

Of these variables, cartilage integrity and symptom duration carry the most clinical weight; structural severity adds important context. How they interact in any one individual requires a full assessment to judge accurately.

When conservative care is not working

Three to six months is the standard window the UK NHS and British Hip Society define for a supervised conservative trial — not three to six months of occasional exercises, but a consistent, progressive programme of the kind described earlier. If meaningful improvement is not appearing within that timeframe, a specialist opinion is warranted. That is not a failure; it is the pathway working as designed.

Certain features suggest the threshold should be reached sooner. Pre-existing articular cartilage damage is the strongest predictor that physiotherapy alone will not be sufficient, which is why imaging findings — not just symptom duration — carry weight in the clinical picture. Additional red flags include a high Tönnis radiographic grade (indicating established osteoarthritic change), a large or severe cam deformity with a high alpha angle, symptoms that have been present for more than 18 months, and age above 45.

Practically speaking, signals worth noting are pain that is worsening rather than plateauing, difficulty with ordinary daily tasks despite genuine engagement with the programme, and persistent night pain.

Where conservative care does fail, hip arthroscopy — keyhole joint-preservation surgery — is typically the appropriate next step for suitable candidates, not hip replacement. Patients with Tönnis grade 2 or higher osteoarthritis sit in a different surgical category, and that distinction matters for how any onward referral should be framed.

The NHS pathway and when to see a specialist

NHS Integrated Care Board policy formalises what clinical practice already recommends: hip arthroscopy for FAI is funded only after a supervised physiotherapy trial of at least six months, and patients with Tönnis grade 2 or higher osteoarthritis are excluded from arthroscopic surgical referral under most ICB frameworks. For many patients in Lincolnshire and across the UK, this explains why a GP is not yet initiating a surgical pathway — the commissioning requirement is the pathway, and it is working as designed.

This context matters because it repositions the six-month programme from something endured while waiting for surgery to something with its own clinical rationale. Evidence shows that a meaningful proportion of patients who complete a genuinely structured programme do not proceed to arthroscopy at all. For those who do, completing conservative care first is both a funding prerequisite and clinically sound preparation for any operative procedure.

What the evidence across this article makes clear is that conservative management and surgery are sequential rather than competing choices for most people with FAI. The question of where any individual sits on that continuum — and whether the standard NHS timeline is appropriate for their situation — is one that specialist assessment can answer more precisely than general guidance alone.

Lincolnshire Hip is part of the MSK Doctors group and accepts patients without referral for hip assessment, with consultations available locally in Sleaford and Grantham.