Hip precautions are movement rules meant to stop a new hip from popping out of its socket while the tissues around it heal. If you’ve been given them, the classic list is: don’t bend the hip past a right angle, don’t cross your legs, and don’t twist the operated leg inward.
They usually last about SIX weeks, sometimes up to 12.
Which rules you get, if any, depends on how your surgeon reached the joint and what they found during the operation.
Here’s the part many people don’t hear: the evidence for strict precautions is weak. Many surgeons now give fewer rules, or none at all. Your surgeon’s instructions come first. If your list differs from this one, follow theirs.
Why precautions exist
- Dislocation means the ball comes out of the socket. It’s painful, needs a trip to hospital, and is usually put back without another operation
- It’s uncommon. In recent studies, around 1 to 2 in 100 people dislocated after a first hip replacement
- The risk is highest in the first few months, while the muscles and the capsule, the tough lining around the joint, knit back together
- Some people carry more risk: a previous operation on the same hip, a redo replacement, or conditions that affect muscle control such as Parkinson’s. Expect stricter or longer rules if that’s you
Posterior approach: from the back
This is one of the most common approaches.
Some surgeons use a side approach instead, so ask which one you had. The risky position is the hip bent up, the knee pulled across your body, and the leg turned in, all at once. Think of sitting in a low sofa, crossing your legs and leaning forward to reach your shoe.
If your surgeon uses precautions after posterior surgery, the usual list is:
- Don’t bend the hip past 90 degrees. Your knee shouldn’t come up higher than your hip. Sit on firm, higher chairs, not low sofas
- Don’t cross your legs or let the operated knee drift across the middle of your body, sitting or lying
- Don’t twist the operated leg inward. Turn your whole body with small steps instead of pivoting on the foot
- Don’t bend down to your feet. Use a long-handled reacher, a sock aid and elastic laces for the first weeks
- Sleep on your back or on the good side with a firm pillow between your knees, if your surgeon allows side lying
Anterior approach: from the front
Here the soft tissues at the back of the hip are left intact, so the risky direction flips. The position to watch is the leg stretched out BEHIND you with the foot turned out, such as a long backward step or a deep lunge.
- Many surgeons give no formal precautions after anterior surgery
- If you do get rules, they’re usually to avoid long backward steps and lunges with the foot turned out
- Sitting and bending to your socks are usually allowed early, though your surgeon may still ask you to go gently
What the evidence says now
Studies pooling several thousand people who had posterior hip replacements found dislocation rates were about the same with and without precautions: roughly 2 in 100 either way. Precautions also didn’t change pain, function or return to work in any meaningful way.
Some studies suggest people without strict rules get moving a little faster. The research is still modest in quality, which is why surgeons remain split. Some always use precautions, some never do, and many decide person by person based on how stable the hip felt during surgery.
Precautions protect a healing hip. Fear of moving it slows the recovery down.
The practical take: if you’ve been told to follow precautions, follow them.
They cost you some convenience for a few weeks and not much else. If you’ve been told you don’t need them, that’s a normal, evidence-based choice, not a shortcut.
Everyday tasks with precautions
- Chairs: pick a firm chair with arms, high enough that your knees sit level with or below your hips. A cushion on a low chair helps
- Toilet: a raised toilet seat for the first weeks
- Getting into a car: push the seat back, sit down backward onto it first, then swing both legs in together, leaning back rather than forward
- Getting dressed: put the operated leg into trousers and underwear first, using a reacher. Slip-on shoes help
- Bed: keep a pillow between your knees when you roll, so the leg doesn’t drop across
- Bath: a shower is easier than getting down into a bath for the first few months
For the week-by-week timeline of walking, driving and work, see hip replacement recovery week by week.
When do precautions end?
- Most rules lift at around 6 weeks, often at your first follow-up visit. Some surgeons keep a few until 12 weeks
- Don’t drop them early on your own, even if the hip feels great
- Stretching back into full movement is gradual. Deep squats, low seats and crossing your legs return over the following months as strength comes back
- Keep building the muscles on the side of the hip. Strong muscles are the hip’s long-term protection
The American Academy of Orthopaedic Surgeons has a clear explainer on dislocation after hip replacement. If your hip replacement follows a fall or a break, see hip fracture surgery recovery.
Go to the emergency department if
- The hip suddenly clunks or gives way and you can’t put weight on the leg
- The operated leg looks shorter than the other, or turned in or out
- You have severe pain after a twist, a fall or getting up from a low seat
- You have chest pain or sudden shortness of breath
Call your surgeon today if
- Your calf is painful, swollen or warm. It could be a clot
- The wound is red, spreading, hot or leaking, or you have a fever
- Pain is getting WORSE instead of slowly better
Mention it at your next review if
- You’re unsure which approach you had or which rules apply to you
- The rules are stopping you from doing your exercises or sleeping
- You want to know when you can kneel, garden or get back to a sport
Follow your surgeon’s rules for the first weeks, then earn your movement back with strength.