Why the recovery pathway is built into the operation

Recovery after hip replacement does not begin when the patient leaves hospital — it is shaped in large part by the choices made in the operating theatre. The surgical technique, the implant selected, and the mobilisation plan are not separate decisions; in a well-designed pathway, they work together from the outset.

Professor Paul Lee approaches hip replacement this way by design. The SPAIRE technique — which Saves the Piriformis And (Obturator) Internus with Repair of (Obturator) Externus — preserves the major posterior tendons rather than dividing them. In traditional posterior hip replacement those tendons are cut and reattached; in SPAIRE, they remain intact. That preservation matters for the timeline ahead: the intact obturator internus creates a passive 'strap effect' that resists early dislocation forces, and the preserved muscle spindles and Golgi tendon organs continue to relay proprioceptive signals to the brain — feedback that supports coordinated movement from the first steps after surgery.

For selected patients who are medically fit, whose surgery proceeds as planned, and who have appropriate home support in place, same-day or next-day discharge is a real and supported outcome within this pathway. It is not a universal promise, and it does not apply to every case.

The week-by-week milestones that follow reflect a typical progression for patients recovering along a SPAIRE-aligned pathway. How quickly any individual moves through each stage is not fixed — and understanding why helps make sense of what the timeline is actually measuring.

Day of surgery to day two: hospital, first steps, and going home

The first mobilisation typically happens within hours of surgery — not the following morning, and not as an optional extra. Getting upright with a walking frame or crutches on the day of the operation is a clinical norm, and one that most patients find considerably less daunting than they anticipated once the anaesthetic has settled and analgesia is on board.

Physiotherapy input begins in hospital, with sessions typically twice each day. The focus is practical: moving safely from bed to chair, walking short distances on a flat surface, managing a flight of stairs, and handling basic self-care without putting the hip into a compromised position. These are the readiness markers that determine when someone can go home — not a fixed number of hours on a ward.

Pain management at this stage draws on a multimodal approach, combining different medication types to reduce reliance on opioids. The aim is comfortable movement rather than perfect rest, and most patients find they can engage with physiotherapy adequately once the right combination is in place. A systematic review of five randomised controlled trials involving 710 patients found that structured early recovery pathways reduced hospital length of stay by an average of 4.7 days without increasing complication rates — supporting the principle that careful early planning does not come at a safety cost.

For selected patients within Professor Lee's pathway — those who are medically fit, whose surgery has gone well, and who have suitable home support in place — discharge on the day of surgery or the following morning is a realistic and supported outcome. For others, one or two nights in hospital remains the more typical picture, with the timing guided by individual readiness rather than a standard clock.

Weeks one and two: settling at home

Coming home typically happens within a day or two of surgery, and the first week at home is quieter than many patients anticipate — not because little is happening, but because the body is doing significant work beneath the surface.

The exercise routine at this stage is structured and specific. Ankle pumps, hip abduction in lying, and gentle knee slides are among the most commonly prescribed movements, carried out at least five times throughout the day rather than in a single concentrated session. Short walks indoors with crutches — initially just around the house, gradually a little further each day — are the primary functional goal during week one.

Pain medication begins to change around the end of week one. The stronger hospital analgesia steps down, typically transitioning to paracetamol or a short anti-inflammatory course as advised by the GP or surgical team. Most patients manage this shift comfortably when they have been keeping on top of doses rather than waiting until discomfort sharpens.

Wound closure strips or stitches are usually removed at around ten days. Until the clinical team gives clearance, the wound should remain dry — no soaking in baths or swimming.

Fatigue across these two weeks is entirely normal and not a sign that something is wrong. Rest periods between exercise sessions are part of the recovery programme, not a lapse in effort — sleep and careful pacing actively support the tissue repair that exercise alone cannot achieve.

Weeks three to six: getting outside, reducing aids, and driving

By week three, most patients are ready to step outside. Short walks on level pavements or gentle paths become realistic goals, and varied terrain gradually rebuilds both strength and confidence. Crutch support remains important initially — uneven surfaces demand considerably more from the hip than an indoor corridor — but distances extend a little further each outing.

Walking aids

The move from two crutches to one typically happens somewhere between weeks four and six. Timing should follow gait quality rather than a fixed date: the relevant cues are whether weight distribution feels even, whether the operated hip is bearing its share of the load, and what a supervised assessment reveals. Reducing aids too quickly tends to produce a compensatory limp that takes longer to unlearn than the time saved.

Sitting, sleeping, and positional guidance

Two positional rules typically apply for the full six-week window: knees should remain below hip height when sitting, and sleep should be on the back with a pillow between the knees to prevent the legs crossing. Low chairs, deep sofas, and crossed legs all stay off the agenda. The six-week follow-up is the natural point to revisit these.

Driving

Returning to the wheel is a clinical decision rather than simply a matter of comfort. The general benchmark is approximately six weeks, with the ability to perform a firm, unhesitating emergency stop as the functional readiness test. Professor Lee assesses this individually — the operated side, the type of transmission, and overall recovery progress all feed into the answer — rather than applying a single date to every patient. Expecting a specific conversation at follow-up is more useful than expecting a blanket rule.

Light tasks at home

Cooking, gentle tidying, and short kitchen tasks become realistic from around week three. Heavier work — carrying shopping, vacuuming, lifting anything significant — waits. Swelling remains common across this phase; elevating the leg, applying ice in short intervals, and breaking up activity with deliberate rest helps keep it manageable without alarming.

Weeks seven to twelve: strengthening, gait, and returning to activity

Cambridge University Hospitals NHS guidance explains the twelve-week milestone in terms of tissue biology: wound closure takes four to six weeks, the surrounding ligaments and joint soft tissues heal over approximately six weeks, then require a further six weeks to consolidate their strength. The arithmetic lands at twelve weeks — and that staged sequence is why most daily movement restrictions are lifted at this point rather than earlier.

Bone and muscle integration continues beyond that milestone, typically over six to twelve months. Functional confidence and complete biological healing are distinct things; understanding that difference makes the months following discharge easier to navigate without unnecessary concern or overconfidence.

Activities from weeks eight to ten

Walking without a stick becomes realistic for many patients across this window, provided gait is even and the hip is consistently bearing its share of the load. Stationary cycling and gentle swimming are both appropriate from around weeks eight to ten for most patients — each loading the joint through a controlled range of movement without the impact stress of walking on hard or uneven surfaces.

Gait normalisation

A compensatory lean, a shortened step on the operated side, or a lateral trunk shift can persist well after discomfort settles, because protective movement patterns take time to unlearn. Physiotherapy — whether clinic-based sessions or a structured home programme — addresses these habits directly rather than leaving them to resolve on their own.

Return to work

Light desk-based work is typically possible from around six weeks. Roles involving prolonged standing, manual handling, or heavy lifting require a longer period, and the specific return date is best agreed directly with the surgical team based on the actual demands of the job and how recovery is progressing.

Hip precautions — what the evidence says and what SPAIRE changes

Many patients arrive at consultation having read that hip replacement — particularly via a posterior approach — requires strict movement restrictions for up to three months. The logic behind those restrictions is real: standard posterior surgery divides the tendons at the back of the hip to gain access to the joint, creating a window during which the reconstructed soft tissues are mechanically vulnerable to dislocation. In that context, limiting hip flexion to below 90° for roughly 90 days is designed as a precaution against a complication that, when it occurs, requires revision surgery in nearly half of cases.

Two recent reviews question how much those restrictions actually contribute to safety. A 2024 meta-analysis drawing on 1,215 participants found no statistically significant reduction in dislocation rates when traditional precautions were applied after posterior total hip arthroplasty. A 2025 scoping review reached a similar conclusion — and both sets of data showed that patients managed without strict precautions achieved better HOOS JR functional scores and discontinued mobility aids sooner.

Because SPAIRE leaves the piriformis and obturator internus tendons intact, the posterior soft tissues retain what the technique terms a 'strap effect': a passive mechanical tether that resists dislocation forces from the moment surgery ends. That preserved anatomy changes the risk picture meaningfully, which is why many patients within this pathway can approach early movement with greater confidence — not because precautions have simply been dropped, but because the mechanical vulnerability that made them necessary is reduced.

Individual weight, muscle tone, and bone geometry still influence how that advantage translates in practice. Professor Lee's post-operative assessment determines the appropriate guidance for each patient; generic THA advice found online may not reflect the surgical pathway or the anatomy involved.

1. [1] No need for hip precautions after total hip arthroplasty with posterior approach: A systematic review and meta-analysis. (2024). https://doi.org/10.1097/MD.0000000000040348 https://doi.org/10.1097/MD.0000000000040348
2. [2] A scoping review on the recommendations of hip precautions after posterior total hip arthroplasty. (2025). https://doi.org/10.1177/22104917251336772 https://doi.org/10.1177/22104917251336772
3. [3] Enhanced recovery pathways improve early outcomes and reduce length of stay in primary hip and knee arthroplasty: A systematic review of RCTs. (2025). https://doi.org/10.1016/j.ijotn.2025.101186 https://doi.org/10.1016/j.ijotn.2025.101186