Don’t count on learning a “correct lifting posture” or a lifting course to prevent low-back pain; cut the weight and number of lifts, and exercise regularly

Workers who took lifting-posture training later had no less low-back pain than those who did not. People who bend more when lifting also do not clearly get more low-back pain. What links to low-back pain is lifting heavy and lifting often: each extra 10 kg per lift or 10 more lifts a day raises risk by about 10%. People who exercise regularly have about 30% to over 40% fewer low-back-pain episodes.

Cost

No money. No more arguing over whether the back bent when lifting, and no spending on back-protection classes or belts. Two things to do. Split heavy loads, use a cart, or get someone to help — only a few extra minutes. Carve out several sessions a week to exercise — that takes long-term sticking.

Benefit

First training. The 2011 Cochrane systematic review pooled 9 randomized trials and 20101 employees. In 7 trials and 19317 people: those who had lifting training reported about as much later low-back pain as those who did nothing (OR 1.17, 95% CI 0.68–2.02, credible range crosses 1). Versus watching a video only, RR 0.93 (0.69–1.25), also similar. Evidence quality medium. The authors conclude that lifting advice and training, with or without handling aids, do not prevent low-back pain or disability from it. Next, bending. A 2020 systematic review of how much the back bends when lifting rated evidence quality low. In the only follow-up study, people who later had low-back pain and those who did not differed by only 1.5 degrees in maximum bend while lifting (−0.7 to 3.7), not significant. Of 11 studies, 9 saw no between-group difference. Another 7 studies used a different measure: people with low-back pain bent 6.0 degrees less while lifting (−11.2 to −0.9). The authors conclude there is no evidence that bending more invites low-back pain. Finally what to do. One meta-analysis pooled 8 follow-up studies: each extra 10 kg lifted per time, low-back-pain risk OR 1.11 (1.05–1.18, about 11% higher). Each extra 10 lifts a day, OR 1.09 (1.03–1.15, about 9% higher). Another pooled 21 randomized trials and 30850 people. Exercise plus education cut low-back-pain episode risk RR 0.55 (0.41–0.74, about 45% lower), evidence quality medium. Exercise alone RR 0.65 (0.50–0.86, about 35% lower), evidence quality low to very low. Education alone RR 1.03 (0.83–1.27), back belts RR 1.01 (0.71–1.44) — neither showed an effect. The UK Health and Safety Executive (HSE) official guidance also states that training alone cannot guarantee safe lifting. Good technique does not replace handling aids and redesigning tasks and loads.

Notes

Controversy. On the “heavy and often” side, views differ. A 2010 systematic review found 9 high-quality studies: 4 saw an association, 5 did not. The authors think workplace lifting is unlikely to cause low-back pain on its own. So “lift less heavy stuff” is only association evidence, not proof of cause. The bending review’s studies are low quality; most compared two groups at one time. The training review’s credible range is wide; it also says no randomized trial looked at whether training treats existing low-back pain. HSE still teaches a technique: keep the load close to the waist, feet stable, don’t twist, don’t yank. When rising, slight bend in back, hips, and knees is better than full bend or full squat. Following it does no harm; just don’t expect it alone to prevent low-back pain. Benefit set to medium. By relative drop, exercise reaches large. But exercise-alone evidence quality is low; exercise plus education also did not clearly cut sick leave; and low-back pain is not fatal. How to exercise: Section 2, Item 16 (30–60 minutes of strength training a week) and Section 2, Item 11 (7000–8000 steps a day). The beneficiary is you.

Sources · 7

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