What physiotherapy is actually trying to achieve

Most patients assume the exercises after hip replacement are precautionary — something to do while waiting to feel better. In practice, they are doing several distinct jobs at once, each targeting a different biological problem, and the sequence matters.

The first priority is circulation. In the hours immediately after surgery, the blood-clotting risk is highest. Simple leg movements begun on the day of the operation are designed specifically to keep venous blood moving through the lower limbs — their job is protective, not rehabilitative, and they work whether or not the patient yet feels strong enough to do more.

The second problem is stiffness. A joint that is not moved begins to stiffen quickly, and the surrounding soft tissues can tighten in ways that are harder to reverse the longer they are left.

The third is muscle strength — and this is often misunderstood. A significant part of the weakness patients feel after surgery is not caused by the operation itself. Months of pain before replacement frequently lead to subconscious movement avoidance, and the muscles around the hip can weaken substantially before anyone picks up a scalpel. Physiotherapy addresses that pre-existing loss alongside the recovery from surgery.

The fourth goal is gait retraining: learning to walk again with a correctly functioning joint, not the compensating, pain-adapted pattern that many patients have developed over years. This shapes not just how quickly someone leaves hospital, but how well they move in the months that follow.

The exercises themselves — and why each one is prescribed

Four movements typically come first, all done lying in bed on the day of surgery itself.

Ankle pumps — rhythmically flexing and pointing the feet — activate the calf muscles, which act as a second pump for venous blood. The aim is practical: keeping circulation moving through the lower legs during the hours when clot risk is highest. Static quadriceps contractions (pressing the back of the knee into the bed and holding) and gluteal squeezes serve a similar immediate purpose, waking up the large muscle groups around the hip and thigh without loading the new joint. Heel slides — slowly drawing the heel up the bed to bend the hip and knee — introduce a small, controlled range of movement, reducing early stiffness while staying well within a safe arc.

NHS guidance suggests performing these exercises at least five times daily at home; while in hospital, a physiotherapist will typically visit twice a day to supervise and progress them.

Once standing and early walking are established — usually within the first day or two — the exercise programme expands to rebuild load-bearing strength. Bridging (raising the hips off the bed) begins to engage the glutes and hamstrings together. Standing hip extension and hip abduction develop the specific muscles needed to control the pelvis during walking. Leg raises restore hip flexor control. Each of these targets a gap that, left unaddressed, would show up as a limp or an unsteady gait.

One practical instruction that often surprises patients: lying flat for around half an hour, twice a day, is routinely advised during recovery. The reason is straightforward — if the hip spends too many hours in a slightly bent position (as it does when sitting), the soft tissues can tighten and the hip may become difficult to straighten fully. A short daily stretch prevents that from taking hold.

How a muscle-sparing approach changes early mobilisation

The difference between a muscle-sparing approach and a traditional posterior technique begins in the operating theatre, but its consequences shape the first days of recovery in ways that go beyond simple pain reduction.

In a traditional posterior hip replacement, several small tendons at the back of the hip — including piriformis and obturator internus — are detached to gain access to the joint, then repaired at the close of the procedure. These severed tissues need time to reattach and regain tensile strength. During that window, the hip depends on behavioural rules rather than intact tissue to stay in position — a constraint covered in the next section.

SPAIRE — Saves Piriformis And Obturator Internus, Repairs Externus — takes a different route. By working through the natural tissue planes of the posterior approach rather than cutting across them, it leaves those tendons intact. The obturator internus tendon, which runs directly across the back of the femoral head, remains under natural tension throughout surgery. This creates what is sometimes described as a 'strap effect': a biological tether that actively resists the femoral head sliding backwards from the moment the patient wakes from anaesthesia.

Preserved tendons carry something else of value: the sensory receptors embedded within them. Golgi tendon organs and muscle spindles — the structures that give the brain continuous feedback about joint position and loading — remain connected and functional. When these mechanoreceptors are severed in a traditional approach, proprioceptive feedback is interrupted until the tissues regenerate; the joint, in a clinical sense, cannot sense itself during that period. Preservation of these receptors in SPAIRE is the mechanistic rationale behind earlier mobilisation, and early clinical experience from muscle-sparing pathways suggests that selected patients are able to stand and walk with notably greater confidence in the first hours after surgery.

Professor Paul Lee, who trained in the SPAIRE technique under Professor Timperley at the Exeter Hip Unit, has built his recovery programme around this intact-tissue logic. Within this pathway at the Lincolnshire Hip Clinic, mobilisation begins earlier and proceeds with greater confidence precisely because the biological architecture that supports joint stability has been preserved rather than repaired.

Hip precautions — what they are and when they may not apply

Mention hip precautions to most patients and they will already have a picture in mind: raised toilet seats, a grabber for picking things off the floor, a strict rule about not bending too far forward. These restrictions are real, and for patients undergoing a traditional posterior hip replacement, they matter.

After a standard posterior approach, the posterior capsule and several small tendons are cut and then repaired at the end of the operation. Until those tissues heal and regain strength — a process that takes roughly 90 days — the hip is structurally vulnerable. During this window, surgeons typically advise patients to avoid bending the hip beyond 90 degrees, crossing the legs, and sitting in low chairs or soft sofas. These are not arbitrary rules; they reflect the healing timeline of divided tissue.

The consequences of dislocation in this context are significant. Roughly 57% of patients who dislocate after a traditional posterior replacement go on to dislocate again, and 45.6% require revision surgery within two years — a major undertaking.

In a SPAIRE pathway, the structural reason for these precautions is largely removed for eligible patients: because the posterior tendons are never divided, there is no 90-day healing window for severed tissue. The joint is stabilised by intact anatomy from the outset rather than by behavioural rules.

This does not mean precautions disappear universally. Individual anatomy, medical history, and intraoperative findings all influence the guidance a surgeon gives. The absence or relaxation of restrictions within a muscle-sparing pathway is patient-specific, and what applies to one person may not apply to another. Specific post-operative guidance always comes from the treating surgical team.

A realistic recovery timeline: what to expect and when

Recovery after hip replacement does not follow a single fixed schedule, but the milestones are real — and worth knowing before surgery rather than after.

The first days

On NHS pathways, most patients go home within one to three days, once the wound is settling and they can mobilise safely. For selected patients within a muscle-sparing private pathway — where the hip is structurally stable from the outset — an overnight stay or same-day discharge may be appropriate. That decision is always confirmed by the surgical team based on how the first day goes, not set in advance.

Weeks 1–3: home mobility

The focus at home is on short, regular walks and the exercises introduced in hospital. Walking independently around the house is realistic within one to three weeks for many patients following a muscle-sparing approach. A walking aid is usually still helpful for confidence and safety during this period; how quickly patients reduce their reliance on it depends on baseline strength, home setup, and pain control.

Week 6: the first major waypoint

Six weeks is where several milestones converge. Most patients are walking with a stick or without one. Wound healing is generally complete by this point. Driving is not advised before six weeks, and requires explicit clearance from the surgical team before resuming — this applies regardless of how well recovery is progressing. For desk-based work, a return around six weeks is realistic for many people; physically demanding roles take considerably longer and need individual discussion.

Three to six months

Soft tissue continues to heal into the three-to-six-month window. Full bone and muscle recovery can take up to six months. Most patients are back to recreational activity within this period.

These markers give a useful framework. The exact pace varies — baseline fitness, the surgical technique used, and individual healing all play a part — but the direction is consistent across most recovery journeys.

Follow-up after hip replacement — what happens and why it matters

For most patients, the physiotherapist is the person they see most regularly after discharge — not the surgeon. Within Professor Lee's pathway, post-operative physiotherapy is delivered locally in Grantham or Sleaford with unlimited sessions, so the depth of that support is not rationed by appointment caps or a fixed course length.

Professor Lee reviews progress alongside the physiotherapy team rather than in a separate clinic. This means adjustments to the programme — progressing exercises, addressing a gait pattern, or managing a setback — are made with both perspectives in the room rather than in sequence.

What follow-up checks is more specific than it might sound. Wound status, walking pattern, pain trajectory, and range of motion are each assessed in their own right. Feeling generally fine is not the same as the hip flexing correctly or the glutes activating properly during gait. Structured review catches problems that patients may not yet notice themselves.

If any of the following appear between scheduled appointments, contact the surgical team without waiting for the next review:

• New or increasing swelling around the joint or thigh
• Wound redness, discharge, or warmth
• Fever or feeling systemically unwell
• A sudden loss of confidence in the hip, or a new sensation of instability

Most patients progress steadily with structured support. The six-to-twelve-week review in particular tends to resolve the question that patients most commonly carry through early recovery: whether the hip is performing as expected, and whether any remaining caution around activity is still clinically warranted — or can now safely be set aside.