HEALTH AT WORK

Ergonomics

Delivery Driver Getting Lower Back Pain After Years of Stepping Down from a High Cab

17 September 2026 · Health at Work · AI-assisted draft

Photo: Tima Miroshnichenko / Pexels

If you have spent years driving a high-sided van or truck and your lower back has been getting steadily worse, you are not imagining it and you are not simply getting older. The act of stepping down from a high cab, repeated dozens of times every working day, is a recognised occupational mechanism for cumulative lumbar spine injury. This article explains exactly what happens to your back during each exit, why the damage builds silently over years, what the warning signs look like at each stage, and what both drivers and employers can do before the condition becomes disabling.

Why Stepping Down from a High Cab Damages the Lower Back

A standard large delivery van or light commercial vehicle positions the cab floor between 60 and 90 centimetres above the ground. Every time a driver exits, the body performs a movement sequence that places extreme demand on the lumbar spine. The driver pivots from a seated position, swings both legs toward the door, grips the handle or frame, and lowers themselves to the ground, often carrying momentum because time pressure is constant in delivery work.

During that descent, three damaging forces act simultaneously. First, the lumbar discs are loaded asymmetrically: the spine is twisted and laterally flexed rather than aligned, which concentrates stress on one side of each disc. Second, the paraspinal muscles, the long muscles running either side of the spine, contract hard to control the descent against gravity. When this contraction happens hundreds of times a day in a twisted position, those muscles accumulate microtrauma faster than overnight rest can repair it. Third, and most destructively, many drivers land with one or both feet rather than lowering in a controlled movement, transmitting a sharp compressive impact up through the heel, knee, and into the lumbar vertebrae. Research in occupational biomechanics consistently identifies this kind of repeated asymmetric impact loading as a primary driver of accelerated disc degeneration.

The problem is compounded by what surrounds the exits. Drivers spend long hours in a fixed seated posture while driving, which flattens the natural lumbar curve and reduces disc nutrition through reduced movement. They then perform a mechanically demanding exit manoeuvre with a spine that has been static and compressed for the previous hour. The transition from sustained static load to dynamic asymmetric load is precisely the condition under which disc injuries occur most readily.

How Many Exits Is Too Many

Last-mile delivery drivers routinely make between 80 and 150 individual stops per shift. Each stop typically involves at least one cab exit and one re-entry. That translates to 160 to 300 lumbar loading events per day, across a working week of five or six days. Over a career of ten years, a driver who averages 100 stops per day accumulates well over a quarter of a million high-load lumbar events from cab exits alone, entirely separate from the manual handling of parcels that follows each one.

No spine tolerates that volume of asymmetric loading without consequence. The question is not whether damage will occur but how quickly it progresses and how severe it becomes before it is identified and managed.

Early Warning Signs a Driver Should Recognise

The early stage is frequently dismissed because the symptoms feel manageable and non-specific. Drivers report a dull ache across the lower back that appears during the second half of a shift and resolves after a night of sleep. Morning stiffness lasting more than twenty minutes is another early indicator, as is a sensation of tightness in the lower back and buttocks after sitting for extended periods in the cab. Some drivers notice that they instinctively brace or wince slightly when stepping down, which is the body signalling that the movement is stressing a sensitised structure.

These signs are easy to attribute to tiredness or a bad week. That attribution is dangerous because it delays the changes that could prevent progression.

What Later-Stage Symptoms Look Like

If the cumulative loading continues unchecked, symptoms shift from muscular to structural. Pain begins to appear in the mornings, not just at the end of a shift, and it no longer fully resolves with rest. Drivers report pain radiating into one or both buttocks, and sometimes tracking down the back of the thigh toward the knee, which indicates involvement of the sciatic nerve root, typically at the L4-L5 or L5-S1 disc level. These are the discs under greatest stress during asymmetric cab exit loading.

At a more advanced stage, drivers describe sharp pain during the exit itself rather than only after it, difficulty finding a comfortable seated position while driving, and pain that disturbs sleep. When nerve compression is present, there may also be numbness or tingling in the leg or foot, and in severe cases, weakness in the foot that makes pressing the pedals feel unreliable. Any neurological symptom of this kind requires prompt medical assessment and should not be managed with rest alone.

What Employers Are Required to Do

Under typical occupational health regulations in most jurisdictions, employers have a duty to assess and control musculoskeletal risks associated with work tasks, and this duty applies clearly to vehicle cab design and driver exit biomechanics. The assessment should identify the cab height, the frequency of exits per shift, whether adequate hand grips and footholds exist, and whether drivers have received any training in safe exit technique.

Where the risk assessment identifies an elevated risk, employers are required to implement controls, not simply to note the hazard. Vehicle procurement decisions that take cab access height and step configuration into account form part of this duty. Providing drivers with workload schedules that reduce stop frequency where operationally feasible is also a recognised control. Employers who operate mixed fleets should consider allocating drivers with existing lower back symptoms to lower-cab vehicles while a health intervention is in place.

Health surveillance for drivers who have been in high-frequency delivery roles for three years or more is good occupational health practice. A brief annual review of musculoskeletal symptoms by an occupational health professional allows early-stage problems to be identified before they become structural.

Practical Controls That Actually Work

In order of effectiveness: the most protective intervention is reducing the height from which drivers descend. Vehicles designed with a lower cab floor, or fitted with a dedicated folding step at a practical intermediate height, reduce the lumbar loading per exit substantially. A single step that halves the descent distance approximately halves the impact force transmitted to the spine. This is an engineering control and it is the only one that addresses the root mechanism.

A well-designed grab handle positioned at the correct height for a two-hand grip during exit is the second most effective control. It converts an uncontrolled descent into a supported movement and allows the driver to control their pace rather than relying on leg strength alone. Handles that are too low, too far back, or require an awkward grip angle provide little real protection.

Driver training in safe exit technique has genuine value but should be ranked below engineering controls. The correct technique involves turning to face the cab before descending, using both hands on a stable grip, lowering one foot to each step in sequence, and making final contact with the ground in a forward-facing, knees-slightly-bent posture rather than a sideways drop. This technique is less fatiguing, more controllable, and distributes the exit load more symmetrically across the lumbar spine. The honest limitation of training is that under time pressure, drivers revert to the fastest available method, which is usually the most biomechanically damaging one. Training works best when it is reinforced by vehicle design that makes the correct technique the only practical option.

Anti-fatigue measures during driving, including lumbar support adjustment, seat suspension quality, and mandatory micro-breaks during shifts longer than four hours, reduce the baseline lumbar loading that drivers arrive at each exit with. A well-supported spine tolerates exit loading better than one that has been statically compressed for two hours.

What a Driver Should Do If They Are Already in Pain

If lower back pain has been present for more than two weeks and is not clearly improving, a driver should report it to their employer and request a referral to an occupational health service rather than waiting for it to resolve on its own. The occupational health assessment should include a review of the specific tasks, cab type, and daily stop frequency, not just a general clinical review.

A physiotherapy assessment that includes observation of actual cab exit technique can identify specific movement faults. Strengthening the deep stabilising muscles of the lumbar spine, particularly the multifidus and the transverse abdominis, improves spinal control during the exit manoeuvre and reduces the load that falls on the discs and facet joints. This kind of targeted rehabilitation is more effective than generic back exercises for occupationally driven lumbar injuries.

Drivers should not self-medicate and continue working through worsening or neurological symptoms. Persistent pain radiating below the knee, any change in bladder or bowel control, or progressive leg weakness are red flags requiring same-day or urgent medical attention. The risk of delaying assessment when these signs are present is permanent nerve damage, not a longer recovery from a muscular strain.

What People Get Wrong About This Injury

The most common misconception is that the lower back pain is caused by lifting parcels and not by the cab exits. Parcel handling does contribute, but biomechanical analysis of delivery drivers consistently identifies the cumulative exit load as a primary and under-recognised factor, precisely because it happens so frequently and because it is not perceived as a single dramatic injury event. A driver who throws their back out lifting a heavy box understands immediately what happened. A driver whose discs have degenerated through 200,000 asymmetric exit manoeuvres rarely connects the outcome to the mechanism.

A second misconception is that this is an age-related condition that cannot be prevented or slowed. It is an exposure-related condition. Reducing exposure through better vehicle design, workload management, and early intervention genuinely changes the trajectory. Drivers who receive effective occupational health support early in the symptom progression frequently remain in work for many more years without significant disability. Those who are told to manage it themselves and keep going often cannot.

Health at Work provides occupational health assessments for drivers and logistics employers, including musculoskeletal risk review and early intervention programmes designed around the specific demands of delivery and transport work.