Workers and Fatigue

In dealing with safety you learn that there are hazards out there that are recognized, but there is no actual rule that covers the hazard.  This is true about sleep and the workplace.  There is no OSHA rule that covers fatigue, etc. that comes from lack of sleep to working unusual shifts.

According to OSHA, extended or unusual work shifts may be more stressful physically, mentally, and emotionally.  Non-traditional shifts and extended work hours may disrupt the body’s regular schedule, leading to increased fatigue, stress, and lack of concentration. These effects lead to an increased risk of operator error, injuries and/or accidents.

Fatigue is a message to the body to rest. If rest is not possible, fatigue can increase until it becomes distressing and eventually debilitating. The symptoms of fatigue, both mental and physical, vary and depend on the person and his or her degree of overexertion.

Some examples include:

• Weariness,
• Sleepiness,
• Irritability,
• Reduced alertness, lack of concentration and memory,
• Lack of motivation,
• Increased susceptibility to illness,
• Depression,
• Headache,
• Giddiness, and/or
• Loss of appetite and digestive problems.

OSHA recommends that when there is a choice, managers should limit the use of extended shifts and increase the number of days employees work. Working shifts longer than 8 hours will generally result in reduced productivity and alertness. Additional break periods and meals should be provided when shifts are extended past normal work periods. Tasks that require heavy physical labor or intense concentration should be performed at the beginning of the shift if possible. This is an important consideration for pre-emergency planning.

In addition managers and supervisors should learn to recognize signs and symptoms of the potential health effects associated with extended and unusual work shifts. Workers who are being asked to work extended or irregular shifts should be diligently monitored for the signs and symptoms of fatigue. Any employee showing such signs should be evaluated and possibly directed to leave the active area and seek rest.

Contributed by Eric Tofte, Director of Training Evergreen Safety Council