What rehabilitation after hip replacement actually involves

Recovery starts on the day of the operation — not the day after, not once the anaesthetic has fully worn off. Within hours of surgery, nursing and physiotherapy staff assist patients out of bed for their first supported steps. Cambridge University Hospitals NHS Foundation Trust guidelines confirm that the physiotherapy team aims to see patients twice daily from that point onwards, and AAOS guidance recommends exercising two to three times every day during early recovery.

The reason for this urgency is straightforward: early movement protects against blood clots, reduces stiffness, and sets the biological conditions for a faster overall recovery. Doing too little in the first days slows healing; doing too much provokes pain and swelling. Calibrating that balance — and adjusting it week by week — is the thread running through the entire six-month journey.

The progression follows a clear arc. In the first days and weeks, the focus is on circulation, basic safety, and gentle restoration of movement. Around the six-week mark, a surgical review typically unlocks more demanding strengthening work. By months three to six, the aim shifts to building endurance and returning to everyday activities.

How quickly a patient moves through these phases, and which specific precautions apply, depends considerably on the surgical approach used. Someone who had a muscle-sparing posterior procedure such as SPAIRE will face different restrictions from someone who had a standard posterior approach — a distinction covered in more detail in the sections that follow. Age, BMI, and any existing health conditions also influence the pace, which is why the exercises described in this guide are illustrative rather than prescriptive: the treating surgeon and physiotherapist set the individual programme.

Day one: exercises in the first 24 hours

Six specific exercises form the standard first-day set, and each has a defined clinical purpose.

Ankle pumps are the first priority — begun in the recovery room and repeated every five to ten minutes throughout the day. Flexing and extending the foot contracts the calf muscles, which drives venous blood back towards the heart and reduces the risk of deep-vein thrombosis (DVT), the most pressing circulatory concern in the early post-operative hours. Ankle rotations complement this, moving the joint in gentle circles to maintain blood flow in the lower leg.

Once in the ward, the remaining exercises address early hip-movement restoration. Bed-supported knee bends (sliding the heel towards the buttocks while lying flat) gently encourage hip flexion within a safe range. Quadriceps sets — tightening the thigh muscle against the bed without lifting the leg — begin rebuilding the strength needed to bear weight. Gluteal squeezes activate the muscles that stabilise the pelvis during walking. Heel slides provide a further gentle range-of-motion stimulus.

Repetitions and sets are individually prescribed; this guide does not specify fixed counts, as the treating physiotherapist tailors the programme to each patient.

On session frequency, AAOS guidance recommends 20–30 minutes of exercise per day, or two to three sessions daily. Some NHS pathways set the bar higher — Cambridge University Hospitals advises at least five sessions per day. In practice, most clinical teams aim for frequent, short bouts rather than a single longer effort.

Walking with a frame or crutches also begins on day one, covering short distances that increase gradually. Two postural habits are introduced from the outset: sitting only in straight-backed chairs rather than low sofas or recliners, and lying flat for 30 minutes twice daily to gently stretch the hip and discourage the flexed posture that prolonged sitting promotes.

Weeks one to six: safe progression at home

The six weeks following surgery are primarily a tissue-healing window. Muscles, tendons, and the joint capsule need time to recover from the procedure, and the guiding principle during this phase is purposeful movement — not aggressive effort.

Walking as the central stimulus

Walking remains the main cardiovascular and muscular activity throughout weeks one to six. The aim is a gradual daily extension of distance, still using the walking frame or crutches issued at discharge. Pain and swelling are the most reliable pace regulators: increased discomfort after a walk signals that distance should be pulled back rather than pushed through. As swelling settles and confidence grows, distances lengthen naturally.

Continuing the basic exercise set

The ankle pumps, gluteal squeezes, quadriceps sets, and heel slides introduced on day one continue through this phase, with the emphasis shifting slightly towards maintaining hip movement range as tissues begin to consolidate. The physiotherapist will guide any progression within what the healing structures can tolerate.

Hip precautions after standard posterior surgery

For patients who had a standard posterior approach, a specific set of restrictions applies during these six weeks. The short external rotator tendons were divided during the operation and take approximately 90 days to heal fully. Until they do, the hip is vulnerable to dislocation if flexed beyond 90 degrees, if the legs are crossed, or if the foot is rotated inwards. These 'hip precautions' directly shape which activities and positions are safe — sitting in a low chair, reaching towards the feet, or twisting to one side all risk breaching that threshold.

SPAIRE and the question of reduced precautions

Patients who had the SPAIRE technique — which preserves the piriformis, obturator internus, and obturator externus tendons intact — may be subject to fewer restrictions, because the posterior soft-tissue restraint that prevents dislocation remains in place from day one. Whether this translates into modified precautions in practice is a decision for the operating surgeon. Patients should ask their consultant directly rather than assuming a blanket reduction applies.

How your surgical approach shapes the rules you follow

The dislocation statistics are the clearest explanation of why those precautions carry such clinical weight. Among patients who dislocate after a standard posterior total hip arthroplasty, around 57% will dislocate again — and approximately 45.6% require revision surgery within two years. Revision carries greater complexity than the primary operation, with longer recovery and higher complication rates. The restriction window described in the previous section is not administrative caution; it reflects a biological reality with measurable consequences if breached.

This is part of what makes muscle-sparing approaches clinically significant. The SPAIRE technique, practised by Professor Paul Lee, preserves the piriformis, obturator internus, and obturator externus intact — meaning the soft-tissue restraint that prevents dislocation is never removed in the first place. The rehabilitation implications follow from the anatomy rather than from cautious convention.

There is also a neurological dimension that is easy to overlook. The short external rotators contain mechanoreceptors — sensory receptors called Golgi tendon organs and muscle spindles — that work rather like the hip's internal GPS: they constantly relay position and load information to the brain. Standard posterior approaches sever these pathways, leaving the hip without that spatial awareness until the nerves regenerate. SPAIRE keeps them intact from day one, providing a neurological safeguard that works alongside the structural one.

For patients comparing approaches, the direct anterior approach (DAA) is a useful reference point. DAA offers faster early functional return — Harris Hip Scores at six and twelve weeks tend to be higher — and patients typically spend less time on mobility aids. However, it carries a recognised risk of lateral femoral cutaneous nerve injury, causing numbness or tingling at the outer thigh, and is associated with longer operative times, higher intraoperative blood loss, and a steeper surgical learning curve in published series. Neither approach is universally superior; suitability depends on anatomy, surgeon expertise, and individual patient factors, and a consultant assessment is the right setting in which to weigh those trade-offs.

The six-week milestone: advancing to standing exercises

Six weeks marks the first formal clinical reassessment point — and, for most patients, the moment exercise shifts decisively from gentle restoration to progressive strengthening. At the post-operative review, the surgeon evaluates gait, pain levels, and hip stability before deciding whether a walking stick or frame is still needed. Many patients are cleared to walk unaided at this stage, though this depends on individual progress and is not a given.

Four exercises are typically introduced once the surgeon gives the go-ahead:

• Standing hip abductions — lifting the leg out to the side while standing at a support. These target the gluteus medius, the muscle responsible for stabilising the pelvis during walking; weakness here is a common source of the post-operative limp.
• Standing hip extensions — pushing the leg backwards from the hip. This works the posterior gluteal muscles and begins restoring the drive phase of a normal walking pattern.
• Sit-to-stands — controlled rising from a chair without arm-pushing. A functional exercise that rebuilds the lower-limb strength needed for everyday tasks.
• Double-leg bridges — lying on the back with knees bent, raising the hips off the floor. This engages the gluteals and hip extensors in a supported position before full loading.

Where stairs are available, stair climbing is a useful addition at this stage: it combines hip extension, balance, and cardiovascular demand in a single functional movement.

Hip precautions — the 90-degree flexion restrictions that applied after standard posterior surgery — are typically reviewed at this milestone, though the operating surgeon confirms whether they continue or are lifted. Patients who had SPAIRE surgery, whose posterior tendons were preserved intact from the outset, should follow whatever modified guidance their own surgeon provided from day one.

Three to six months: conditioning, confidence, and daily life

For most patients with an uncomplicated recovery, the three-month mark brings a qualitative shift: daily life stops feeling like rehabilitation and starts feeling like ordinary living. The hip continues to consolidate — bone integration and soft-tissue remodelling continue for months beyond surgery — but the practical focus moves from structured exercise sets to sustained, low-impact movement and building genuine confidence in the joint.

Activities in this phase are not the discrete strengthening sets of the six-week programme but ongoing conditioning: longer walks, swimming, stationary or outdoor cycling, and progressively confident stair use. Swimming and cycling are particularly useful because they load the hip through a wide arc of movement without the impact forces of running or racquet sport. The relevant question shifts from 'am I doing the right exercises?' to 'how far can I walk comfortably, and how does that distance grow week on week?'

Functional confidence — the patient's subjective trust in the hip — tends to lag slightly behind objective strength, and often catches up in this window. Activities that initially felt uncertain, such as walking on uneven ground or taking stairs unaided, typically become unremarkable. Most patients at six months are back to the full range of ordinary daily activities: moderate walks, independent shopping, light gardening, and travel. Some are walking several miles without discomfort; a smaller group still notices mild asymmetry in more demanding situations — a longer stride on an incline, or tiredness on one side after an extended outing.

Return to driving, recreational activity, and travel is generally discussed with the surgeon between six weeks and three months, depending on individual progress; more physically demanding pastimes are usually reviewed at the six-month appointment.

Where subtle asymmetry persists despite good subjective recovery, objective gait assessment can be useful — it measures load distribution and timing across both limbs during walking, revealing compensatory patterns that routine clinical examination may not capture. Identifying these early supports targeted rehabilitation before they become habitual.

Patients with questions about their own recovery timeline, or who want to understand what progress to expect at six months, can book a consultant-led assessment at Hip Replacement Lincolnshire without a GP referral — details at hipreplacementlincolnshire.co.uk.