Posterior Hip Precautions: What the Three Rules Really Mean

If you have recently come home from a hip replacement done through the back of the hip, someone has probably handed you a short list of posterior hip precautions. There are usually three: do not bend the hip more than 90 degrees, do not cross the operated leg past the midline of your body, and do not turn the operated leg inward. This page explains where those rules come from, how long they tend to last, and, just as importantly, where they quietly show up in an ordinary day. The Feldenkrais Method® has something genuine to offer here, not as a way around any rule, but as a way to live inside the rules with attention rather than fear.

What posterior hip precautions are and why surgeons give them

In a posterior approach, the surgeon reaches the joint from behind, through tissue at the back of the hip. While that tissue heals, one particular combination of positions, deep bending plus crossing plus inward turning, aims the head of the new joint toward the very area that was opened. The three precautions exist to keep the hip away from that combination during the healing window, which is most often somewhere between 6 and 12 weeks.

Now the honest part. Practice varies more than most patients realise. A growing number of surgeons prescribe fewer restrictions after a posterior approach, or none, and the research on whether strict precautions actually lower dislocation rates is mixed. None of that is an invitation to relax anything on your own. It means the opposite: since reasonable surgeons differ, the only instructions that matter are the ones your own surgeon gave you, and the length of your healing window is set by your surgical team at your follow up visits, not by a web page. An anterior approach, reached from the front of the hip, usually comes with different precautions or none at all, which is one more reason a neighbour's experience may not match yours.

If it helps to know you have company, hip replacement is one of the most common operations in the world, largely because osteoarthritis affects about 528 million people worldwide as of 2019, with the knee most affected and the hip close behind (WHO, 2023).

Where posterior hip precautions hide in an ordinary day

Here is what the discharge sheet rarely tells you: the three rules are almost never broken during anything that feels like exercise. They are approached, quietly, in small domestic moments. A sofa that is a little too low takes the hip past 90 degrees before you have finished sitting down. A low car seat does the same, and swinging both legs in together can carry the operated leg across the midline. Reaching down for a sock or a shoelace folds the hip deeply while turning the leg. Sleeping on your side lets the top leg drift across and roll inward without your knowing. Even turning back to pull a car door shut can twist the leg inward while the foot stays planted.

Once you can name these moments, something shifts. Instead of holding your whole body rigid all day, afraid of an invisible line, you can be genuinely careful in the five or six situations that matter and breathe normally through the rest. The skill is learning to let the rest of you take part, so the pelvis and torso travel together, the chest turns instead of the leg, and a task comes to you rather than pulling your hip toward its limit. For the specific skills of seating and movement choices, our guide to sitting in a chair after hip replacement and our guide to exercises to avoid after hip replacement go deeper into those two territories.

Living inside posterior hip precautions with curiosity instead of bracing

Precautions arrive as a list of NOs, and a list of NOs tends to make people stiff everywhere, not just at the hip. Fear of one joint spreads into a guarded walk, a held breath, a body that stops trusting itself. The reframe this page offers is simple: the precautions describe three positions to avoid, not a way of being. Everything else about you is allowed to move, and the more freely your back, ribs, and pelvis participate, the less any single moment pushes the hip toward a limit. This is exactly the ground the Feldenkrais Method® works on, awareness of how a whole body organises an action, and it all happens inside your surgeon's rules, never around them.

To be clear about roles, your surgeon and physical therapist lead your recovery, and movement education of this kind sits alongside their care. Other approaches such as gentle yoga or Pilates work through their own different mechanisms, and any of them would also need your team's blessing at this stage. You can read more background in our Feldypedia guide to post surgery movement recovery. Later, once your team has lifted your restrictions, rebuilding the hip and knee's sense of position is a lovely next step, and our knee proprioception exercises show what that gentle work feels like. When you feel ready to explore this quality of attention for yourself, with your team's agreement, the Feldy 7 day free trial is a quiet place to begin, and the full program for knee or hip pain carries the same gentle approach forward.

Common Questions about posterior hip precautions (FAQ)

How long do posterior hip precautions last?

Most surgical teams that use them keep posterior hip precautions in place for somewhere between 6 and 12 weeks, while the tissue around the new joint regains its strength. Some surgeons now use a shorter window, and some use none at all. The duration that applies to you is decided by your surgical team at your follow up visits, not by any general guide.

Do posterior hip precautions apply after an anterior approach?

No, not as a rule. An anterior approach reaches the hip from the front, so the positions that could stress the healing joint are different, and many anterior patients receive different precautions or none at all. If you are not certain which approach your surgeon used or which rules apply to you, ask your surgical team directly rather than assuming.

How should I sleep with posterior hip precautions?

Many teams suggest sleeping on your back at first, often with a pillow between the legs so the operated leg cannot drift across the midline or roll inward during the night. If side sleeping is permitted, the pillow between the knees and ankles usually stays. Since sleeping advice varies from surgeon to surgeon, confirm your own team's preference before changing anything.

When should I call my surgical team?

Contact them urgently if you feel sudden severe pain in the hip, cannot put weight on the leg, notice the leg looking shorter or turned outward, or feel a pop or clunk deep in the joint, since these can signal dislocation. Call them promptly, though less urgently, whenever you are unsure whether a movement or position is allowed for you.

What happens if I accidentally break one of the precautions?

A brief slip, such as leaning too far for a moment, does not automatically mean harm, and most such moments pass without any consequence. Come back within your limits, notice what led to the slip, and carry on. If the slip came with pain, a popping feeling, a change in how the leg looks, or trouble bearing weight, contact your surgical team right away.

How is gentle movement education different from physical therapy?

Physical therapy after a hip replacement is prescribed clinical rehabilitation, tailored to your surgery, and it comes first. Movement education works on something else: noticing your habits, so you sense earlier when an everyday action is drifting toward a limit, and finding ways for the whole body to share the work. It sits alongside your clinical care and never replaces it.