"After a fusion operation you must never bend again, never pick up your grandchild, and never lift anything heavy for the rest of your life." Many patients hear advice like this just after leaving hospital, and some become so frightened that they dare not even bend down to pick up clothes that have dropped on the floor. The worry is understandable, but it mixes up two quite different things: the protective restrictions in the early stage of bone healing, and the exaggerated lifelong ban of "you must never bend again". Telling these two apart is the core of this article.
The conclusion first: that is not the case. In the early period after fusion surgery (the bone-healing period, about the first 12 weeks), large bending, twisting and lifting heavy objects do have to be avoided, but the idea of "never bending or lifting for life" is purely a myth. Once the bone has healed, patients should restore activity step by step. Staying away from bending for the long term instead feeds fear-avoidance and leaves the back weaker and weaker, which in the end does more harm than good (Haddas 2025; Mathew 2025).
Staged protection after surgery and long-term activity
Put simply, the early adjustment of activity after fusion surgery usually uses about 12 weeks as the reference. After this period, the right direction is to "increase activity step by step, in line with the timetable of tissue healing" (Haddas 2025). Patients should neither suddenly go back to all their former activities when a certain day arrives, nor refuse to move and resist bending from then on. A systematic review also warns that if a restriction programme lacks an evidence base, it may delay activity, let physical function decline and deepen fear of activity, and in the end harm the recovery (Mathew 2025).
Where "no bending for life" comes from, and the need for early protection
The saying is not entirely out of thin air. It comes from blowing up a protective period that is real but time-limited. The aim of fusion surgery is to join two spinal bones that could move into one block. Before the bony bridge is fully firm, large bending, twisting and lifting will repeatedly pull on the interface of the internal fixation and could in theory affect the fusion. Avoiding large flexion under load in the early period after surgery therefore does make sense. The narrative review by Haddas (2025) notes that the adjustment of activity after fusion usually refers to a timetable of about 12 weeks. The best-practice pathway drawn up by expert consensus (Bogaert 2023, modified Delphi) also stresses that rehabilitation should move towards "fewer restrictions and earlier activity", and that decisions on returning to work and resuming activity should be based on physical function and not simply on the length of time.
The crux is that many people mistake this protection period of several weeks to several months for a lifelong ban. The protection period does exist, but it has a start and an end, and stretching it without limit is the source of the myth. How long the protection period actually lasts depends on which operation the patient had and how many spinal levels were fused, and the individual operation report and the instructions of the treating surgeon must be followed.
Early restrictions after surgery compared with long-term activity
Putting the two stages side by side shows clearly that the word "restriction" means quite different things at different stages of recovery:
- Aim: let the bone really fuse and protect the internal fixation
- Avoid large flexion, twisting and lifting
- But still do walking, posture keeping and gentle transfers
- A time-limited protection with an end point (Haddas 2025)
- Aim: restore the ability to bend and lift step by step
- Judged by function (whether it can be done steadily) and not by number of days
- No proven benefit from stricter and longer restrictions (Mathew 2025)
- The consensus pathway favours fewer restrictions and earlier return (Bogaert 2023)
In other words, the question the patient should be asking is not "when do the restrictions run out" but "how much load can I add now, given the current progress of bone healing and my physical function". To get a full picture of the general idea of "when you can bend" and the differences between types of spine operation, go back one level and read the truth about activity restrictions after spine surgery.
Research evidence on extending activity restrictions
A direct answer: the current medical evidence does not support the view that "the stricter the restriction the safer". A systematic review (Mathew 2025) screened 3,723 articles and found only 4 studies that met the criteria (all on the lumbar spine), and the certainty of evidence for all outcomes was low. It could not confirm that stricter restrictions help to ease pain, improve function or reduce recurrence. Extending the view to discectomy studies, where the evidence base is stronger, the conclusion is just as consistent:
The length of the restriction period did not change clinical results (Bono 2017, n=108)
- Comparing activity restriction of 2 weeks versus 6 weeks, the recurrence rates in the two groups were 11% versus 7% (p=0.52)
- At every assessment time point, there was no difference in the ODI function index or in the VAS scores for back pain and leg pain
- The result shows that stretching the restriction period too far gives no extra protection
Results of studies with no activity restrictions (Carragee)
- The 1999 study of 152 cases: 98% of patients returned to work successfully, with an average sick leave of only 1.2 weeks, and an early return to work was not linked to recurrence or the need for repeat surgery
- The 1996 study of 50 cases: return to work after an average of 1.7 weeks, 97% resumed their jobs smoothly, and the recurrence rate was only 6% (all occurring more than a year later)
- The authors concluded that preventive activity restrictions after surgery may not be necessary
One point must be added. The strong evidence from Carragee and Bono on no restriction or short restriction comes from discectomy, and cannot be applied unchanged to fusion surgery, because fusion involves a bone-healing timetable and appropriate protection is indeed needed early on. Analysed together with the study by Mathew (2025), however, the two point to the same conclusion: there is no research evidence behind extending activity restrictions without limit, or treating them as an iron rule for life.
"Releasing by the calendar" versus "adding load by progress"
Once it is understood that activity restrictions do come to an end, the next step is how to resume activity. Once the bone has healed, can the person go back to heavy work all at once on a particular date? Of two quite different ways of thinking, only one is right:
| Releasing by the clock (not correct) | "Clock-style" release treats a date on the calendar as a switch, with the attitude that "once 12 weeks are up I can do whatever I like" and restores all daily activity at once, ignoring the person's own healing progress and physical ability at the time. This one-size-fits-all approach is usually either too cautious or too hasty. |
| Progressive load recovery (correct) | "Progressive loading" follows the principle of "increasing activity step by step, in line with the timetable of tissue healing" (Haddas 2025). The approach is to restore bending and lifting from light to heavy, one step at a time, watching at every step whether the body feels steady and whether there is any flare-up of discomfort the next day. Every arrangement uses physical function as the standard and not time alone (Bogaert 2023). The end of the protection period only means "load can now start to be added slowly", and by no means "use full strength at once". |
The effect of a long-term hard ban on bending and lifting
Extending activity restrictions without limit is not a harmless case of "better safe than sorry", and patients often pay a real price for it. Haddas (2025) points out that lifting-technique training which drills in the idea that "lifting with a bent lower back is harmful" does not change the risk, the recurrence rate or the duration of back pain episodes. In other words, sticking for the long term to a rule such as "never bend or lift" simply does not bring the protection expected. Mathew (2025) warns more directly that restriction programmes without an evidence base, by delaying normal activity, worsening deconditioning and feeding fear-avoidance, end up working against recovery.
The vicious circle seen clinically is exactly this: the more the person fears activity, the less active the person is, so the back and core muscles get weaker and stiffer, so the slightest activity brings discomfort, and the patient believes even more that "I really cannot move". In contrast, a combined rehabilitation programme of exercise and cognitive behavioural therapy effectively reduces disability in the long run (effect size −0.84) and fear-avoidance (−1.40), which confirms that active recovery is far better than long-term avoidance (Greenwood 2016, although the evidence is of low quality). The direction of rehabilitation is therefore quite clear: a long-term hard ban on activity does more harm than good.
How to practise bending and lifting again once the bone has healed
What is listed below are the broad principlesof rehabilitation and not a rigid timetable. When to start and how large the movements should be must be adjusted flexibly by the physiotherapist for each person, according to bone healing, clinical symptoms and the surgeon's instructions:
Directions for restoring bending and lifting step by step
- Judge by function, not by the number of days—The key measure is not "how many days since the operation", but "can the movement be done steadily and without pain". Only after passing steadily can the person move to the next stage (Bogaert 2023).
- Add load step by step, not in one jump—In practice, start by picking up light things, keeping the object close to the body and bending the knees, and then slowly increase the weight of the object and the amount of bending. After each increase in difficulty, watch the body's response at the time and the next day, and go back one level as soon as there is discomfort.
- Use a hip hinge in place of bending only at the lower back at first—In the early stage of rehabilitation, if the person needs to bend to pick something up, a "hip hinge" posture, bending the hips and knees with the lower back kept straight, can share the load. Once the person is in the recovery phase, the ability of the lower back to take bending load is trained step by step.
- Treat bending and lifting as an ability to retrain, and not to avoid for good—The long-term aim is not to avoid bending and loading for life, but to rebuild the back's capacity under professional guidance and overcome the fear of moving, so that the patient moves from "not daring to move" to "knowing how to move".
Is exercising under professional supervision safe? The answer is that it is safe and very beneficial. The systematic review by Greenwood (2016) points out that combined rehabilitation with exercise after fusion helps to improve disability and reduce fear-avoidance in the long run, and the earlier review published by Rushton (2012) also supports physiotherapy rehabilitation after surgery. Although the quality of evidence in both is low, their conclusions point the same way: active recovery is clearly better than long-term avoidance.
Why advice differs between healthcare professionals
Why does the instruction on "the most weight you can lift" differ from patient to patient? There is a reason behind it. A clinical practice survey of physiotherapists in the UK (Rushton 2014, with a response rate of 83.5%) found clear differences and no unified standard in the profession's assessment and activity advice after fusion surgery. The study by Mathew (2025) also confirms that the research evidence in this area is indeed limited. So when a patient hears contradictory activity limits from different healthcare professionals or from relatives and friends, it is mostly because practice differsclinically, and not because there is a hard rule that applies to everyone. Faced with a vague instruction such as "don't lift too much", the patient can ask the healthcare staff directly which movement exactly is meant and how much weight can be taken at present, and work out a rehabilitation plan that suits the person together with the physiotherapist.
The reality of home life in Hong Kong and local rehabilitation resources
Living spaces in Hong Kong are generally cramped, and people can hardly avoid bending to reach things in a small kitchen or bathroom. During home assessments, the team often meets service users after fusion surgery who ask anxiously as soon as they begin: "Does this mean I can never bend again or carry my grandchild for the rest of my life?", showing strong fear. The physiotherapist first clarifies the difference between "protective restrictions in the early bone-healing period" and "a long-term lifelong ban", explains it in terms of the tissue-healing timetable, and demonstrates on the spot how to use the hip hinge technique to lift things and to add load step by step, helping them move from "not daring to move" to "knowing how to move". If the patient lives in a tenement building without a lift and has to carry daily necessities, or has to carry heavy shopping home from the wet market, the therapist does not simply say "don't lift heavy things". Instead the therapist designs a two-stage plan to suit the person: first, changes to the environment (moving frequently used items to a height between the waist and the shoulder), and then step-by-step restoration of the load on the lower back in bending. Actual function (whether the movement can be done steadily and without pain) is the criterion for easing the restrictions step by step, and not blindly holding to a single weight limit or number of days.
Local rehabilitation resources: In public hospitals, allied health (physiotherapy) rehabilitation services after orthopaedic or spine surgery generally need a referral from an orthopaedic or family medicine doctor. The public can look up the details of the physiotherapy departments and service points of each hospital cluster through the "list of allied health clinics (physiotherapy)" on the website of the Hospital Authority, or phone the HA hotline on 2300 6555. To find a registered physiotherapist to draw up a progressive loading rehabilitation plan after surgery, the Hong Kong Physiotherapy Association (HKPA) website has a "find a physiotherapist" member directory (www.hongkongphysiotherapy.org.hk).
Asking a physiotherapist for help and arranging progressive training
If, after fusion surgery, the patient or family is at a loss because different healthcare professionals or relatives and friends give contradictory instructions on "how many pounds can be lifted", the registered physiotherapists at Nova Health can provide home physiotherapy to set up a safe and reliable progressive loading plan tailored to the person according to the stage of bone healing. The therapist first helps the patient tell the early protection apart from the long-term recovery, then eases the bending and lifting restrictions step by step using physical function as the marker, and also guides carers in the right everyday techniques for supporting and lifting the patient. Because the operation and the individual contraindications differ from one patient to another, a professional assessment by a physiotherapist should come before any exercise programme is started. For more on the facts about bending, lifting and twisting after surgery, the article on the truth about bending, lifting and twisting is worth reading.