Ashwin Lewis
Working non-traditional shifts can interfere with the body's natural circadian rhythms, making it difficult to fall asleep and get adequate rest. This is known as Shift Work Sleep Disorder (SWSD), a condition that affects people working outside the regular 9-5 schedule, including night, early morning, or rotating shifts. SWSD can lead to issues such as hypersomnia, difficulty concentrating, lack of energy, and irritability. Additionally, untreated post-work fatigue resulting from job stress can have psychological and physiological consequences, including loss of self-esteem, social support, and increased risk of stroke or heart attack.
Several factors contribute to SWSD and work-related fatigue, such as inadequate sleep, physical inactivity during work hours, caffeine consumption, and exposure to artificial light, which disrupts circadian rhythms. However, it's important to note that work is not the sole cause of sleep issues, as strenuous exercises, competitions, and other lifestyle choices can also impact sleep quality.
To combat SWSD and improve sleep after work, individuals can make lifestyle changes, practice good sleep hygiene, establish a consistent bedtime routine, reduce caffeine intake, and incorporate more natural light and physical activity into their daily routines.
| Characteristics | Values |
|---|---|
| Stress | Workplace stress can cause sleep issues, and a lack of sleep can increase stress levels. |
| Work environment | Negative changes in workplace leadership and fairness have been associated with the strongest long-term impact on a worker's sleep. |
| Shift work | Shift work can disrupt sleep patterns, and the type of shift worked determines how much sleep is lost. |
| Sleep deprivation | Sleep deprivation can negatively impact concentration, attention to detail, creativity, memory, and decision-making. |
| Caffeine consumption | Caffeine consumption, especially in the afternoon or evening, can impair the ability to fall asleep. |
| Weekend sleep patterns | Changes in sleep patterns over the weekend can make it harder to fall asleep on Sunday nights. |
| Screen time | The use of smartphones, tablets, and other electronic devices before bed can disrupt sleep. |
| Relaxation routines | Adopting relaxation techniques and healthy sleep habits can help reduce stress and improve sleep quality. |
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What You'll Learn
Shift work sleep disorder (SWSD)
The disorder arises from a mismatch between an individual's internal body clock and their external environment, affecting the timing and duration of sleep. Normally, the visual cue of sunlight triggers the internal clock during a 24-hour day, signalling the body to wake up and start its active day. However, for those working non-traditional shifts, these cues do not align with their waking and sleeping hours, negatively impacting their sleep and wakefulness. For example, night shift workers often sleep during the day when their body's signals to stay awake are strongest, leading to short and disrupted sleep.
The symptoms of SWSD include difficulty falling asleep or staying asleep, feeling tired even after sleeping sufficiently, hypersomnia (excessive sleepiness at unwanted times), difficulty concentrating, lack of energy, decreased alertness, poor mood, and irritability. These symptoms can interfere with an individual's life, affecting their cognitive performance and reaction times, and increasing the risk of workplace accidents.
To diagnose SWSD, a doctor may use the International Classification of Sleep Disorders or the Diagnostic and Statistical Manual of Mental Disorders. They will ask about sleep patterns, disturbances, shift schedules, medical history, and current medications. A sleep diary or sleep journal covering at least seven to fourteen days may also be requested. Since SWSD can mimic other sleep disorders, conditions such as narcolepsy and obstructive sleep apnea may need to be ruled out through additional tests or a sleep study.
SWSD can be treated through lifestyle changes, light therapy, and/or medication. Recommended lifestyle changes include maintaining a regular sleep schedule, taking 48 hours off after a series of shifts, wearing sunglasses when leaving work, taking naps when possible, limiting caffeine intake, eating a healthy diet, using heavy shades to create a dark environment, minimising noise, and avoiding a long commute. Light therapy, such as wearing blue light-blocking glasses, can also help improve sleep quality and work performance.
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Stress and anxiety
The relationship between stress, anxiety, and sleep is reciprocal, and addressing one of these issues can lead to improvements in the others. For example, getting enough sleep on a nightly basis can alleviate stress quite effectively. However, stress and anxiety can also cause insomnia, and insomnia can be a symptom of psychiatric disorders like anxiety and depression.
Treatments for sleep anxiety include therapy, better sleep hygiene, and medication. Cognitive behavioural therapy for insomnia (CBT-I) has been proven effective in alleviating insomnia symptoms. CBT-I helps people overcome inaccurate or negative beliefs about sleep and overcome insomnia by emphasising sleep restriction, proper sleep hygiene, coping skills, and relaxation techniques.
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Exercise and diet
Exercise can help stabilize your mood and decompress your mind, which is important for transitioning to sleep. However, exercising too late in the day or too close to bedtime can interfere with sleep for some people. This is because exercise increases your body temperature and releases endorphins, which can keep your brain and body awake. Therefore, it is recommended to exercise at least 1 to 2 hours before bedtime to give your body time to wind down.
Engaging in at least 30 minutes of moderate aerobic exercise can improve sleep quality. Some examples of aerobic exercises include power lifting and active yoga, which elevate your heart rate and create the biological processes in the brain and body that contribute to better sleep. It is important to note that the type of exercise and the time of day may vary for different individuals, so it is recommended to listen to your body and assess how well you sleep in response to your workout routine.
If you are experiencing post-exercise insomnia, it may be due to several factors. One common cause is dehydration, which makes it difficult to lower your body temperature and can increase your heart rate, disrupting your sleep. Another factor is the release of hormones such as norepinephrine and cortisol, which can remain elevated for up to 48 hours after exhaustive exercise, contributing to sleeplessness. Additionally, consuming caffeine before or during workouts can also impact your sleep.
To improve sleep after exercise, consider incorporating a cool-down period after your workout and ensure that you are adequately hydrated. Additionally, assess your diet and ensure you are providing your body with the necessary nutrients for recovery. If you feel tired after a workout, a nap can support muscle recovery and improve sleep debt, but it is important to limit the nap duration to avoid disrupting your nighttime sleep.
Overall, exercise can be beneficial for improving sleep quality, but it is important to be mindful of the timing and intensity of your workouts to optimize your sleep.
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Work environment
The relationship between sleep and work is a two-way street. Sleep quality and duration can affect work performance, and work environment and culture can impact sleep.
A study published in the Journal of Occupational and Environmental Medicine found that workers who reported higher levels of sleep troubles had higher rates of absenteeism and lower work performance ratings. This can be due to a variety of factors, such as impaired reaction times, increased irritability, and poor mood.
Work stress is a significant factor that can affect sleep quality. This can be due to new job anxiety, a heavy workload, or a demanding work schedule. Shift work, in particular, can disrupt the sleep-wake cycle and result in shift work sleep disorder (SWSD), causing issues with falling and staying asleep, as well as sleepiness at unwanted times. About 20% of the full-time workforce in the United States participates in some form of shift work, and 10-40% of those experience SWSD.
The constant connectivity enabled by technology can also blur the lines between work and personal time, making it challenging to disconnect from work and affecting sleep. A 2021 survey by the American Psychological Association found that up to 66% of US adults considered work a significant cause of stress, and nearly 74% reported feeling the physical effects of stress, including changes in sleeping habits.
To mitigate the impact of work stress on sleep, it is essential to establish healthy sleep habits and routines. This can include relaxation techniques, limiting screen time before bed, and seeking professional support if needed. Additionally, creating a bedtime routine, optimizing the bedroom environment, and maintaining a consistent sleep schedule can promote better sleep.
Discussing work-related sleep issues with a supervisor or HR department may also be beneficial, as psychological detachment after work hours and supporting employees' sleep needs can improve concentration and productivity.
By addressing the work-related factors that impact sleep and adopting healthy sleep habits, individuals can break the cycle of work stress and sleep disruption, improving overall well-being and work performance.
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Sleep hygiene
Stick to a Schedule
Try to go to sleep and wake up at the same time every day, even on weekends. Maintaining a strict routine will help set and regulate your body's internal clock, making it easier to fall asleep and wake up at consistent times. This is especially important if you work non-traditional hours, as shift work can disrupt your natural sleep-wake cycle.
Manage Light Exposure
If you work night shifts, managing light exposure is crucial. Blue light, emitted by electronic devices like phones and laptops, can reduce melatonin levels and make it harder to fall asleep. Consider using blue-light blocking glasses or installing blue-light filters on your devices. Alternatively, stick to activities that don't involve electronic devices, such as reading a book or listening to soothing music.
Create a Restful Environment
Make sure your bedroom is dark, cool, and comfortable. Use blackout blinds or curtains to block out light, and consider using an eye mask if you need to sleep during the day. Keep the temperature between 65°F and 68°F (17°C to 19°C) for optimal sleep. Reserve your bed only for sleeping and intimacy to strengthen the mental association between your bed and sleep.
Wind Down Before Bed
Avoid stressful or stimulating activities close to bedtime. Give yourself at least an hour before bed to wind down and relax. Try relaxation techniques such as deep breathing, meditation, or gentle stretches. Write down your worries or to-do lists to get them off your mind and help you relax.
Limit Caffeine and Alcohol
Caffeine and alcohol can disrupt your sleep. Limit your caffeine intake to the morning or early afternoon, and avoid consuming alcohol in the evenings. Alcohol may help you fall asleep initially, but it disrupts your sleep patterns, leading to a non-refreshing sleep.
Regular Exercise
Engage in regular exercise, but avoid strenuous workouts within a few hours of bedtime. Exercise can help tire your body and improve sleep quality, but the timing of your workouts is essential. Strenuous exercise too close to bedtime can increase your body temperature and energy levels, making it harder to fall asleep.
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Frequently asked questions
Working night shifts can be tough on your sleep schedule. Here are some tips to help you sleep:
- Set up your bedroom environment by keeping it dark, covering windows with room-darkening shades or curtains to block out any external light.
- Adjust the temperature in your room to a cool, comfortable setting.
- Unplug or turn off phones and other electronic devices so you are not disturbed.
- When you go to work, surround yourself with plenty of bright light.
- If you drink caffeine, do so early in your shift.
- If the sun rises during your commute home, wear dark sunglasses to limit exposure to external light.
If, after two weeks, you still have problems sleeping, consult your doctor. They may be able to provide additional suggestions to help adjust your body's sleep-wake rhythm.
Working night shifts can affect your sleep and health in several ways:
- You may experience a disrupted sleep schedule, feeling exhausted even after sleeping more than usual.
- Your eating habits may be affected, with some people eating a lot less.
- You may become less active on your days off, impacting your overall health.
- Working night shifts can sometimes reduce time spent with family and friends due to conflicting schedules.
