Key Points
- There is insufficient evidence that load—such as lifting or carrying—is the primary cause of nonspecific or chronic low back pain.
- Management strategies based solely on reducing load, like limiting lifting, are not effective for preventing or curing most low back pain cases.
- Clinical implication: A focus only on load reduction should be replaced with a more comprehensive biopsychosocial approach to better help people manage nonspecific low back pain.
- Study limitation: Evidence is limited by differing definitions, study designs, and possible publication bias, so results should be interpreted with caution and further research is needed.
- Patient implication: People living with low back pain can be reassured that most daily activity, including lifting, is safe, and recovery relies on many factors beyond simply reducing load.
Understanding The Role Of Load In Low Back Pain
Nonspecific low back pain is pain in the lower back that cannot be traced to one particular cause, disease, or injury. It affects many people at some point in their lives and can become chronic, meaning it lasts for several months or more.
Traditionally, many assumed that lifting, carrying, or any repeated physical workload put harmful strain on the spine, causing or worsening back pain. This view is part of the older “biomedical model” that links pain to physical tissue damage alone.
However, recent evidence challenges this idea. Many people engage in activities that load the spine without developing chronic pain, and many with pain have no clear connection to these activities. For this reason, the review looked closely at whether load truly causes nonspecific low back pain or whether other factors are more important.
Why Is This Review Important?
Low back pain leads to enormous personal suffering, lost work, and high healthcare costs worldwide. Because old beliefs about lifting and load being dangerous are common, patients and clinicians often get the message that they must avoid lifting or carrying objects and that “resting the back” is best. Workplace policies and rehabilitation recommendations have often reinforced this approach. Understanding the real causes behind nonspecific low back pain matters for everyone—patients, physiotherapists, employers, and society.
This major review examined if current research supports spinal load as the main cause of chronic low back pain, using strict scientific standards. The findings challenge the long-standing habit of blaming “lifting” and call for updated, science-led approaches.
What Did This Review Do And How?
Researchers searched scientific studies published between 2010 and 2021 to see if spinal load—meaning lifting, carrying, or repetitively putting weight on the lower back—causes the start of nonspecific low back pain or explains why pain becomes chronic.
To judge whether load truly “causes” pain—not just happens alongside it—they used the respected Bradford-Hill framework for causation. These criteria include strength and consistency of relationships, if the factor happens before the pain (temporality), if more load means more pain (biological gradient), if there are plausible biological explanations, and if removing the factor makes pain go away (experiment).
This approach is thorough and helps to separate cause from mere association.
Key Evidence On Load As A Cause Of Low Back Pain
The review looked at 22 studies, including systematic reviews and high-quality trials.
1. Strength and Consistency Of The Evidence
Studies showed only a weak link between physical lifting or manual work and nonspecific low back pain. For example, regular lifting at work increased the overall risk of low back pain by only about 4% compared with those who did not lift regularly—a much smaller effect than widely assumed. Many people who lift regularly remain pain-free, and some with back pain lift very little.
Even when all studies were combined, the link was not strong or consistent. Some research even found that people without pain sometimes lifted more.
2. Temporality And Biological Gradient
For spinal load to be a cause, it must come before pain develops. Some studies on heavy lifting found a short-term link, but this did not hold up over time. As for a “biological gradient” (more load equals more pain), the review found no clear evidence that greater lifting or heavier loads caused more back pain at a population level.
3. Specificity And Analogy
Specificity means there is a “special” link— that only people exposed to higher spinal load develop persistent nonspecific low back pain. However, pain often occurs without any particular lifting event, and lifting is only weakly connected. Moreover, other factors, like stress, sleep, overall health, and even beliefs about pain, may have a much stronger influence.
Analogy means similar activities elsewhere in the body give similar problems. Research did not support this for back pain, strengthening the conclusion that focusing just on physical load is too simplistic.
4. Biological Plausibility And Coherence
From a biological perspective, heavy lifting increases pressure within the intervertebral discs. But many people with disc degeneration seen on scans have no pain. Similarly, many with chronic pain show no such changes. Pain is usually complex, and the nervous system can remain sensitive long after tissues have healed, especially when other factors—such as stress or beliefs—are present.
5. Experiment—Does Reducing Load Prevent Or Cure Low Back Pain?
Controlled trials where load was reduced or altered did not show a clear benefit. For example, many workplace interventions that tried to limit lifting or promote “correct” lifting did not reduce low back pain. Surgery or special exercises aimed solely at unloading the spine were not better than other approaches, or even no treatment, for chronic pain.
These findings suggest that simply “unloading” the spine is rarely the key to recovery.
For The Patient: Why Does This Matter To Me?
If you live with low back pain, these findings are relevant to you for several reasons. For years, you may have been told that your pain is due to lifting, carrying shopping, making a bed, or picking up a child. You may have avoided activities, changed jobs, or missed out on social events out of fear that you are “damaging” your back. This new research allows you to reframe that fear.
The most important message is that, for most people, nonspecific low back pain is not caused by lifting or daily activities. Pain tends to arise from a mix of things – including lifestyle, general health, stress, not enough movement, previous injuries, or even just being unlucky. You do not need to be afraid that lifting or physical activity alone will harm your back or make things worse.
Understanding this evidence-based message helps to empower and reassure you: Recovery is possible, and moving with confidence is far better than avoiding activity.
For The Patient: Can I Continue Lifting? Is It Safe For My Back?
Based strictly on the best available evidence from this review, most people with low back pain can continue lifting, within sensible limits. Avoiding lifting altogether is rarely necessary and, in many cases, can even hinder recovery. When lifting feels too painful, it is reasonable to adjust or reduce this activity temporarily, but the goal should almost always be to gradually return to normal activity.
There is no strong evidence that lifting during daily life is unsafe for people with chronic nonspecific low back pain. The human spine is robust and designed to move and bear loads. In fact, staying active—including lifting within your own limits—can help strengthen the back, build confidence, and speed recovery.
Of course, if you experience sudden, severe pain after lifting something very heavy, or if your pain persists despite gradual activity, seeking guidance from a qualified physiotherapist is recommended. Generally, though, lifting and moving are safe, and not something to fear.
Complex Causes Of Chronic Low Back Pain
One of the clearest findings of this review is that both the onset and persistence of most low back pain come from complex, intertwined causes. These include:
- Physical factors, like posture, flexibility, and previous injuries
- Psychological factors, like beliefs about pain, mood, stress, and confidence
- Social and environmental factors, like workplace culture, support, and pressure to keep working even when sore
Instead of just looking at the back as a “mechanical machine” that gets worn out, modern science recognises the full person and their life context.
Does Avoiding Lifting Or Restricting Load Help?
Simply put, no. Most study evidence does not support strategies that focus only on unloading the spine or reducing physical demands as a way to prevent or cure chronic low back pain. Encouraging rest or avoiding activities is not helpful for most people, and can actually increase disability or make recovery take longer. The exception may be situations involving very heavy loads, repeated trauma, or acute injuries—these are not the usual cause of nonspecific or chronic low back pain in the general population.
Instead, staying active, moving within your abilities, and gradually resuming normal roles are all effective ways to get better.
What Is The Best Way To Manage Low Back Pain?
Biopsychosocial Approach
The best management for nonspecific or chronic low back pain is a comprehensive approach that considers physical, psychological, and social aspects. This is called the “biopsychosocial” model. Key elements are:
- Education: Understanding that pain does not mean damage and that the back is strong
- Gradual Return To Activity: Encouraging regular movement, including lifting and bending, as tolerated
- Support For Mental Health: Addressing stress, mood, and unhelpful thoughts about pain
- Lifestyle Changes: Including sleep, overall fitness, and building healthy habits
Common Myths About Back Pain And Lifting
The belief that lifting, especially at work or home, is the main cause of back pain is outdated, even though it is still widespread. Campaigns focusing on ergonomics or the dangers of manual labour have not reduced the burden of chronic low back pain and may actually increase fear and avoidance. It is time for both patients and physiotherapists to move away from these myths.
Practical Advice For People With Low Back Pain
- Do not avoid lifting, bending, or moving unless these activities are causing intense, new pain.
- Try to stay as active as possible, returning to normal routines as pain allows.
- If a particular movement is very painful, modify it briefly, but aim to get back to doing it over time.
- Build confidence in your body—understand that pain is not always linked to tissue damage.
- Remember, a supportive physiotherapist can help guide you through gradual movement and activity without focusing only on the “mechanics” of the back.
Compassionate Reassurance For Patients
It is natural to worry about your pain, and no one is saying it is “all in your head” or that pain is not real. All pain is real and deserves respect and careful management. The message from modern physiotherapy is that your back is strong, safe to move, and designed for living—not something fragile or easily harmed by sensible lifting.
Are There Any Exceptions Where Lifting Is Dangerous?
A minority of cases involving trauma, highly repetitive heavy manual labour, or specific medical diagnoses (such as fractures, infection, or nerve injury) require special care and possibly avoiding lifting. Most people with chronic low back pain do not have these issues, and general movement and lifting are encouraged. If severe, worsening, or new symptoms appear (such as significant weakness, numbness, or changes in bladder/bowel control), urgent medical attention should be sought.
Practical Summary For Both Patients And Physiotherapists
Patients:
- Avoiding all lifting is not necessary and may delay your recovery.
- Moving, staying active, and returning to normal life is the best medicine for most people.
- Seek help if pain continues, becomes worse, or you are unsure.
Physiotherapists:
- Educate thoughtfully—do not reinforce outdated messages about avoiding load.
- Motivate and support gradual return to activity.
- Address the whole person: beliefs, habits, mood, work, and social environment.
- Tailor plans for each individual, not just their pain.
- Keep up to date with evidence and avoid relying on biomechanics alone.
References
de Bruin, L. J. E., Hoegh, M., Greve, C., & Reneman, M. F. (2024). Insufficient Evidence for Load as the Primary Cause of Nonspecific (Chronic) Low Back Pain. A Scoping Review. Journal of Orthopaedic & Sports Physical Therapy, 54(3), 176-189. https://doi.org/10.2519/jospt.2024.11314
