Why are my employees so tired after a day of stacking boxes?

Feeling tired after a day of stacking boxes is neither a coincidence nor a sign of weakness. It is a direct result of the way the human body reacts to repetitive, strenuous, and often unnatural movements. Anyone who lifts, carries, bends, and stretches while handling boxes every day is putting more strain on their muscles, joints, and spine than they can handle in the long run. The following questions delve deeper into exactly what happens, which risk factors play a role, and how ergonomic lifting aids make a difference.

What happens to the body physically when stacking boxes repeatedly?

Repeatedly stacking boxes puts excessive strain on muscles, tendons, and joints because they are constantly performing the same movements without sufficient recovery time. The back muscles, shoulders, and wrists bear the heaviest load. After a few hours of stacking, muscles deplete their energy reserves, leading to muscle tension, a burning sensation, and pronounced fatigue at the end of the workday.

Specifically, two processes play a major role. First, lactic acid builds up in the muscles when they are used intensively and repeatedly. Second, the intervertebral discs in the back are strained with every lifting and twisting motion. They act as shock absorbers, but need time to recover. Anyone who moves boxes all day long does not allow them that time to recover.

In addition, people who handle boxes often work in awkward positions: bent over, with outstretched arms, or with their torsos twisted. Each of these positions significantly increases the pressure on the spine compared to standing upright. The body compensates for this with extra muscle tension, which only exacerbates fatigue.

What risk factors exacerbate fatigue during manual stacking?

The physical strain in the warehouse is exacerbated by a combination of factors: the weight and shape of the boxes, the height to which they are stacked, the frequency of the tasks, and the available space to move around. When several of these factors are unfavorable at the same time, fatigue increases exponentially rather than linearly.

The most common risk factors are:

• Weight exceeding the recommended lifting limit: Boxes weighing more than 15 to 20 kg significantly increase the risk of strain, especially when lifted frequently.
• Lifting above shoulder height or below knee height: Both of these ranges of motion force the body into extreme positions that place maximum strain on the back muscles.
• High repetition rate without a break: Short cycle times do not allow the muscles to recover between repetitions.
• Irregularly shaped or difficult-to-grip boxes: Boxes without handles or with an uneven distribution of weight require more muscle strength and coordination.
• Cold or hot environments: Extreme temperatures accelerate muscle fatigue and reduce manual dexterity.

The layout of the workspace also plays a role. Narrow aisles force employees to twist, which puts strain on the lumbar spine. Poor flooring increases muscle tension in the legs and back because the body is constantly compensating for instability.

What are the long-term effects of stacking boxes every day?

Musculoskeletal disorders are the most common long-term consequences of stacking boxes on a daily basis. Chronic back pain, herniated discs, tendinitis in the shoulders, and carpal tunnel syndrome in the wrists are typical occupational illnesses among warehouse workers who have worked for years without ergonomic support. These conditions develop gradually, which means they are often not noticed until the damage is already severe.

In addition to the physical consequences, there are also indirect effects. Employees who suffer from chronic fatigue perform less effectively, make more mistakes, and are at a higher risk of workplace accidents. Prolonged overexertion also leads to higher rates of absenteeism due to illness, which increases the workload on the remaining team members and sets off a downward spiral.

From a business perspective, this means, in concrete terms: higher replacement costs, higher insurance premiums, and lost production. Ergonomics in the workplace is therefore not only a matter of human well-being, but also of operational continuity. Those who invest early in the right approach can avoid significantly higher costs in the long run.

How do ergonomic lifting aids reduce physical strain?

An ergonomic lifting aid reduces physical strain by supporting the weight of the box and allowing the employee to work in a neutral, upright posture. Instead of bending, pulling, or twisting, the employee controls the movement while the device provides the force. This reduces pressure on the spine and significantly decreases muscle tension in the shoulders and arms.

A commonly used solution for boxes is the vacuum lifter. A vacuum lifter for boxes grips the box using negative pressure and lifts it without the employee having to exert any force. The employee positions the box precisely but does not bear the weight themselves. This makes it possible to place even heavier boxes in high or low positions without straining the back.

The benefits of ergonomic lifting aids are clear:

• Less muscle tension and fatigue at the end of the workday
• Maintain proper posture throughout the entire shift
• Faster and more precise placement of boxes, even in hard-to-reach locations
• Greater flexibility in employee deployment, regardless of their physical condition
• Lower risk of acute injuries such as sprains and muscle strains

Ergonomic lifting aids not only solve the problem of fatigue but also increase productivity. When an employee expends less energy on the physical effort itself, they have more mental energy left to focus on accuracy and speed.

When is a job analysis the right first step?

A workstation analysis is the right first step whenever employees are consistently tired after their workday, report complaints about their back, shoulders, or wrists, or when absenteeism rises without any other apparent cause. An analysis identifies the exact risk factors and prevents the selection of a solution that does not align with the actual situation.

Many companies resort to using a lifting aid without first thoroughly analyzing the work situation. This creates the risk that the chosen solution will not be suitable for the specific boxes, the floor layout, or the workflow. A workstation analysis takes a holistic view: the movements employees make, the height differences they work with, the weights they handle, and the frequency with which they do so.

An analysis is also useful as a preventive measure, even before symptoms arise. Especially in warehouses where material handling operations are intensive, it pays to take a proactive approach. The investment in an analysis is minimal compared to the costs of long-term absenteeism due to illness or a poor investment in the wrong equipment.

How Logitrans Handling Helps Alleviate Fatigue Caused by Stacking Boxes

We understand that fatigue in the workplace is not only a human issue but also an operational risk. That is why we offer a structured approach that begins with an analysis and ends with a customized solution.

• Free Workstation Analysis: Our specialists will visit your site to assess the workstation and identify the exact risk factors.
• Customized Solutions: Based on the analysis, we select the most suitable ergonomic lifting aid—from vacuum lifters to mobile lifters—tailored to your specific boxes and workflow.
• Demonstration Area in Drongen: You can test our lifting solutions yourself using your own materials, so you can be sure you’re making the right choice for your situation.
• Training and Support: Upon installation or delivery, we can provide hands-on training for users upon request.
• Maintenance Contracts: Through our service department, we keep your equipment in top condition to ensure that ergonomic protection is maintained.

Don't wait until you experience your first back problems or your first extended absence from work. Contact our team today for a no-obligation consultation about the ergonomic challenges in your warehouse.

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