Why the anterior approach lets you load your hip from day one

Anterior approach hip replacement patients can typically bear full weight from the moment they wake because no muscle or tendon was cut to reach the joint. The surgeon enters through the intermuscular plane between the tensor fasciae latae and the sartorius — a natural anatomical corridor at the front of the hip that gives access to the joint without disturbing the gluteal muscles, hip flexors, or any of the stabilising tendons attached to the femur.

That distinction matters more than it might seem. Conventional posterior approaches detach tendons from the bone to open the joint. Those tendons must be reattached at the end of surgery and require time to heal before the structures can be loaded confidently. Early weight-bearing in that context risks disrupting the repair. The anterior approach removes that constraint entirely: the hip's force-generating structures are intact from the outset, and there is no reattachment healing to protect.

Enhanced Recovery After Surgery (ERAS) protocols for anterior hip replacement reflect this directly, permitting full weight-bearing as tolerated from day one. The mean NHS inpatient stay for primary total hip replacement fell from seven days in 2004 to 4.08 days by 2021, a shift driven in part by early mobilisation becoming the standard expectation rather than the exception.

The anterior approach does carry practical constraints — it requires a specialised traction table intraoperatively and may be technically more demanding in patients with larger body types. These factors influence patient selection and, in turn, which rehabilitation pathway applies. The week-by-week milestones that follow are built directly on the intact-muscle anatomy described above.

The first week: hospital discharge and walking with aids

For most anterior approach hip replacement patients, discharge now happens within one to three days of surgery — not because the process is being rushed, but because the pathway is designed so that early movement is the recovery, not a hurdle before it begins.

Physiotherapy starts during the inpatient stay itself, often on the same day as surgery or the morning after. The first session is modest: sitting out of bed, standing, and a short walk along the ward corridor with a frame or crutches. The goal is not distance but confidence — establishing that the hip will bear weight, that pain is manageable, and that transfers (getting in and out of bed, on and off a chair) can be done safely.

Before going home, the team will carry out a stairs assessment. This is a standard discharge criterion: the physiotherapist confirms the patient can navigate a flight of steps — leading with the operated leg going down, the unaffected leg going up — using the banister and a crutch. Passing the stairs check is one of the clearest functional signals that week one at home is safe to begin.

Walking at home in week one

The routine that works best in week one is short, frequent walks rather than a single long outing. Walking around the house — to the kitchen, to the bathroom, into the garden — every hour or two keeps the hip moving, reduces stiffness, and builds daily distance incrementally. Crutches or a frame remain in use throughout; they are not a sign of slow recovery but an active part of gait retraining while the soft tissues settle.

Elevation, ice packs, and prescribed analgesia are not separate from rehabilitation — they directly support it. Swelling that is not managed will limit walking tolerance, so keeping the leg elevated when resting and taking analgesia at regular prescribed intervals (rather than waiting for significant pain) is part of the physical recovery plan.

Watch for these signs

Most week-one discomfort is expected and manageable, but seek urgent review if any of the following appear: calf pain or swelling (possible deep vein thrombosis); sudden worsening hip pain or a feeling that something has shifted; fever, increasing redness, or discharge from the wound; or breathlessness and chest pain, which require emergency attention.

Weeks two and three: building distance and starting hip exercises

By the end of week one, a baseline is in place. Weeks two and three are about building on it — extending daily walking distance and beginning gentle exercises that keep the hip moving without yet demanding strength.

Walking distance

The most useful indicator is not how far a walk was, but how the hip feels the morning after. If swelling and stiffness are unchanged or settling, distance can be extended; if either has increased noticeably, the session was too long — pull back slightly and build again. Most patients also transition from a walking frame to elbow crutches during this window, when flat-ground walking feels consistently comfortable. There is no fixed date for the change: it happens when narrowing the base of support feels safe, not because the calendar says so.

Gentle exercises

Hip exercises at this stage focus on range of motion and muscle activation rather than load. Lying heel slides, supported standing hip abductions, and seated ankle pumps are typical examples — they preserve movement and keep the abductors and hip flexors firing without placing significant demand through the joint. Strength work comes later; the aim in weeks two and three is to maintain what week one established and to begin restoring the proprioceptive feedback that guides confident weight-bearing.

Fatigue

Whole-body tiredness is normal and expected at this stage. Surgery is a significant physiological event, and walking with crutches loads the upper body and uses muscles in ways that are not yet automatic. Fatigue indicates that recovery is under way, not that progress has stalled.

Pain-free weight-bearing on flat ground remains the guiding criterion throughout this phase. When it is consistently achievable and morning swelling is settling, the pathway moves forward — with progression adjusted individually at community physiotherapy appointments in Grantham or Sleaford.

Weeks four to six: reducing aids and moving toward unassisted walking

'When can I stop using crutches?' is the question that dominates weeks four to six — and the honest answer is that it depends on what the hip can do, not what the calendar shows.

The decision to move from two crutches to one is guided by three functional criteria: consistent pain-free weight-bearing on the operated leg, adequate hip abductor control during stance, and the absence of a Trendelenburg shift — the characteristic pelvic drop that indicates the abductors are not yet strong enough to hold the pelvis level as the other leg swings forward. When a physiotherapist observes all three, reducing to a single crutch is appropriate. When one or more is absent, holding on two supports the gait and protects the hip from compensatory loading patterns that are harder to correct later.

The single crutch belongs in the hand opposite the operated hip. During stance phase, it creates an external moment arm that reduces the load the abductors must generate to keep the pelvis level — a simple mechanical benefit that many patients find intuitively counter-intuitive.

Stair confidence with a rail and single crutch is typically the next milestone before unassisted walking is attempted. Negotiating stairs single-crutch requires control, balance, and a reliable stance phase — the same components needed for walking without support on flat ground.

Abductor and glute strength during single-leg stance is usually the limiting factor at this stage, and exercise progressions reflect that: controlled single-leg loading, standing hip abductions without support, and small step-up work when the physiotherapist judges the hip ready.

Some patients reach unassisted walking within the six-week window; others take longer, depending on pre-operative fitness, age, pain tolerance, and how consistently they have engaged with exercises. Both trajectories are normal. The six-week review marks a gateway into the next phase of strengthening and activity — not a finishing line.

Gait symmetry: what it means and how it is assessed

Gait symmetry, in practical terms, is the degree to which each leg performs the same role at the same point in the walking cycle. After anterior hip replacement, three parameters give the clearest picture: step length (how far ahead the foot lands), stance-phase duration (how long the operated leg carries full weight), and limb loading (how evenly force is distributed side to side). When any of these is reduced on the operated side — quicker swing-through, a shorter push-off, a hesitation in stance — the hip is still being offloaded rather than trusted with full load.

Physiotherapists assess these patterns observationally during walking: monitoring step length, pelvic control, and cadence at each session. The Trendelenburg shift described in the previous section remains the most visible single marker of insufficient abductor strength, but it is one part of a broader picture. Where available, pressure mats and motion-capture tools add numerical precision to what clinical observation can already detect. In a healthy adult, full symmetry typically sits at around 95–100% on a step symmetry index; that figure is useful context, but what constitutes functional symmetry after hip replacement is calibrated individually at each assessment — shaped by age, activity goals, and pre-operative starting strength — rather than applied as a fixed population benchmark.

Preoperative hip function plays a significant role in how quickly symmetry returns. Research by Fortin and colleagues found that patients with low pre-operative function were five times more likely to need daily-living assistance two years post-surgery — a finding that reflects the muscle reserves available when gait retraining begins, not a ceiling on eventual recovery. In community physiotherapy at Grantham and Sleaford, symmetry targets are therefore set to the individual and adjusted as strength, confidence, and hip control develop across sessions.

Community physiotherapy and knowing when to seek review

Community physiotherapy through the Lincolnshire Hip pathway runs from local clinics in Grantham and Sleaford, with no cap on sessions. The programme is not a fixed course — it adjusts at each appointment to what the patient actually demonstrates: how the hip is loading, whether abductor control has consolidated, and what the next progression should be. Consistent attendance during weeks two to six matters because this is when functional gains are fastest and when small technique corrections yield the most benefit.

Patients who were less active before surgery may need more sessions than those who arrived with stronger baseline fitness. This is planned for in the pathway, not exceptional — recovery pace varies by pre-operative condition, age, and how quickly hip abductor and glute strength responds to loading.

Signals worth raising with your physiotherapist

The acute warning signs covered at discharge — calf pain, wound changes, fever, chest symptoms — remain relevant throughout recovery and should still prompt immediate contact. In the community phase, the signals most worth flagging to the team are functional rather than acute: a gait plateau that has not shifted after two or three sessions, a persistent Trendelenburg shift at or beyond week four, or a day-to-day regression in weight-bearing that cannot be explained by increased activity. These are not cause for alarm — they are the physiotherapist's cue to reassess and adjust the programme.

By six weeks, patients who have attended consistently and engaged with home exercises are typically walking with reduced or no aids and managing daily tasks with noticeably less effort. For those still working toward those markers, the pathway continues — the six-week point is a review milestone, not a cutoff. Lincolnshire Hip accepts patients without referral if questions about recovery trajectory arise at any stage.