Understanding Fatigue in the Workplace and How to Manage It

Sleep Deprived Worker

What do some of the industrial mishaps have in common? The causes of these accidents are often linked to sleep deficit and worker fatigue.

Alberta Human Resources and Employment reports that most workplace accidents occur when human bodies are naturally attuned to be wanting to sleep i.e. between midnight and 6 am, and between 1 pm and 3 pm.

Do you worry about workplace accidents? Now with Alsco First Aid Training and First Aid Essential Equipment Rental Services, you can rest assured. Get a free audit of your workplace done today to know what exactly you need to do.

A fatigued worker can adversely impact not just his own health, safety and efficiency, but  the safety and efficiency of operation of the organisation as well. In order to combat fatigue, it is important to understand the causes of fatigue. A fatigue risk management system (FRMS) is an important tool in combating worker fatigue throughout an organisation and requires active participation from all members.

Understanding Fatigue

In order to combat fatigue, we must first understand what it is. So what really is fatigue and how does it impact the workplace?

According to the Canadian Centre for Occupational Health and Safety, fatigue is the state of feeling very tired, weary or sleepy resulting from insufficient sleep, prolonged mental or physical work, or extended periods of stress or anxiety. Boring or repetitive tasks can intensify feelings of fatigue. Fatigue can be classified as either acute or chronic.

Acute fatigue results from short-term sleep loss or from short periods of heavy physical or mental work. The effects of acute fatigue are of short duration and usually can be reversed by sleep and relaxation.

Chronic fatigue syndrome is the constant, severe state of tiredness that is not relieved by rest. The symptoms of chronic fatigue syndrome are similar to the flu, last longer than six months and interfere with certain activities.

What Are the Symptoms Of Fatigue?

Fatigue manifests itself in various ways. Some of it’s obvious signs and symptoms include:

  • tiredness,
  • irritability,
  • sleepiness, including falling asleep against your will (“micro” sleeps),
  • depression,
  • loss of appetite,
  • giddiness,
  • digestive problems, and
  • increased susceptibility to illness.

Causes of Fatigue

Fatigue and decreased alertness can result from various factors. Some of the more common work-related factors include long work hours, long hours of physical or mental activity, inadequate breaks between activities, insufficient rest, excessive stress and a combination of these. Understanding the causes of fatigue will help workplaces find ways to combat it and to improve performance and reduce accidents.

Workload and Schedule

With the progress of the day, workers begin to feel tired. Their natural energy gets consumed and they find themselves putting in more efforts and concentration on getting things done.

Working in long shifts, without adequate rest or breaks or tackling tasks that require plenty of mental or physical exertion also put a strain on the mind or body leading to fatigue.

A human body has its own internal body clock and circadian rhythms. These allow the body to make a distinction between night and day, with the night-time being designated for sleep, during which activity the body rests and recuperates for the following day.

Any disturbance to body’s natural sleeping pattern and internal body clock, because of long hours, night shifts, intercontinental travel etc. can cause fatigue.

The imbalance between workload and staffing levels can lead to problems with shift work. Both scheduled or sudden absences of employees can cause the problems with shift work to worsen.

Changes in workload (increased demand, a merging of facilities, etc.) can enhance the problems too. Staffing levels, play the largest role in determining the following:

  • Average amount of overtime per employee;
  • Average time off between consecutive blocks of shifts;
  • Average time off between shifts;
  • Average work hours per week;
  • Average number of consecutive days worked;
  • Average length of shifts;
  • The discrepancy between the published shift schedule and the actual shift schedule worked.

This is because, in most 24/7 operations, the number of positions to fill on each shift is fixed.  At the same time if the staffing level is below the optimal, then the employees in that operation have to put in additional hours or extra shifts to keep the number of positions filled.

Health Considerations

The state of the health of the worker can have a direct impact on the fatigue levels of a worker. Vitamin deficiencies, arthritis, thyroid, heart problems, diabetes, cancer and other such conditions can enhance the feeling of fatigue in the human body.

Regular sleep is important for the body. Sleep disorders such as insomnia, sleep apnea, which prevent the human body from getting adequate or proper sleep can cause fatigue.  Certain health treatments or medicines can cause disturbance to sleep as a side effect.

Environmental Exposures

Certain factors such as exposure to rapid changes in temperature, working in extreme environments, sitting near hot or cold air vents or ducts will enhance the fatigue levels of the body.

Low lighting, glares resulting in eye strain, the presence of loud or constant noise results in people needing to concentrate harder in order to achieve the same output, causing fatigue to set in faster.

How does fatigue impact the workplace?

It is difficult to quantify and measure fatigue. Because fatigue cannot be “measured”, it is difficult to separate the effects of long working hours or lack of sleep to any changes in accident or injury rates.

However, studies report the detrimental effects of fatigue on the workplace are:

  • reduced decision-making ability,
  • reduced ability to communicate properly,
  • reduced complex planning skills,
  • reduced productivity and performance,
  • reduced levels of attention and vigilance,
  • reduced stress handling abilities,
  • reduced reaction time – both in speed and thought,
  • loss of memory or the ability to recall details,
  • unable to stay awake (e.g., falling asleep while operating machinery or driving a vehicle),
  • failure to respond to changes in surroundings or information provided,
  • increased tendency for risk-taking,
  • increased medical costs,
  • increased errors in judgement,
  • increased forgetfulness, and
  • increased sick time, the rate of employee turnover, absenteeism,
  • increased accident rates.

Researchers led by Judith Ricci, Sc.D., MS, of Caremark Rx Inc., conducted a study of the relationship between health and productivity at work. The study examined the effects of fatigue on health-related absenteeism and “presenteeism,” or days the employee was at work but performing at less than full capacity because of health reasons.

Nearly 29,000 employees were interviewed for this study. 38 percent of them said they had experienced “low levels of energy, poor sleep or a feeling of fatigue” during the previous 2 weeks. Total lost productive time averaged 5.6 hours per week for workers with fatigue whereas it was 3.3 hours for their co-workers who had not experienced fatigue.

The study said that the main ways by which fatigue reduced performance was through reduced concentration and by increasing the time needed to accomplish tasks.

With adjustment for other factors, fatigue was more common in women than men. Workers with “high-control” jobs – relatively well-paid jobs with decision-making responsibility – also reported higher rates of fatigue.

Employers Pay a Steep Price for Worker Fatigue

For U.S. employers, fatigue carried overall estimated costs of more than $136 billion per year in health-related lost productivity – $101 billion more than for workers without fatigue. What is even more noteworthy is that 84% of those costs were due to reduced performance while at work, rather than absenteeism.

Health conditions for which fatigue is a major symptom – such as depression or anxiety – accounted for only a small part of the productivity losses. Far more of the costs were thought to result from a wide range of other physical and mental health problems that may occur when fatigue also is present.

How can Workplaces Minimise Worker Fatigue?

Work-Life Programs, Improved Treatment/Assessment Could Help. Previous studies have found that fatigue is a common symptom that is linked to missed work time. Ricci and her team conclude that the results identify fatigue as a major problem in the U.S. work force, and one with a major impact on productivity and costs.

“Interventions targeting workers with fatigue, particularly women, could have a marked positive effect on the quality of life and productivity of affected workers,” the researchers conclude. They suggest that companies could offer “work-life programs” to help employees balance their work and personal responsibilities and take steps to improve assessment and treatment for the large subgroup of workers who have fatigue co-occurring with other health conditions.

Fatigue Risk Management System

The most effective method to minimise worker fatigue is through a comprehensive Fatigue Risk Management System.

Key Components of an FRMS

According to the task force, key components of an FRMS include:

  • A fatigue management policy;
  • Fatigue risk management, including collecting information on fatigue as a hazard, analysing its risk, and instigating controls to mitigate that risk;
  • Fatigue reporting system for employees;
  • Fatigue incident investigation;
  • Fatigue management training and education for employees, management (and families);
  • Sleep disorder management; and
  • A process for the internal and external auditing of the FRMS that delivers corrective actions through a continuous improvement process.

An FRMS requires a senior manager to be ultimately accountable for managing fatigue risk. However, all key stakeholders need to be actively engaged.

‘A positive organisational culture where employees and management trust one another and where information about fatigue is openly reported is important to the successful implementation of an FRMS’ is key for a successful FRMS. As with the management of all risks, however, there is not a ‘one-size-fits-all’ solution and the FRMS must be developed in response to the needs of the industry, the regulatory environment and the organization in which it applies.

Despite all the best efforts of your management and the organisation, accidents due to worker fatigue may still happen. Emergency response procedures are required. Every organisation is required to have people trained in first aid  and superior quality, hospital- grades supplies that are clearly organised in a wall mounted first aid kit in order to supplement their efforts.

Does your workplace have these? Not sure what to do. You can get these by simply visiting the Alsco First Aid Kit webpage and subscribing to our service online. Should you need any assistance, do not hesitate to call us on 1300 077 391 and speak to our friendly representatives.




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Disclaimer – These articles are provided to supply general health, safety, and green information to people responsible for the same in their organisation. The articles are general in nature and do not substitute for legal and/or professional advice. We always suggest that organisations obtain information specific to their needs.