Why does shift work affect sleep?

Shift work disrupts the body's natural circadian rhythm — the internal clock that regulates when you feel awake or sleepy. Irregular hours, daytime sleeping when the body expects to be active, and work-related stress all interfere with sleep quality and duration. This can lead to difficulty falling asleep, staying asleep, and feeling fully rested even after a full sleep period.

What foods help shift workers sleep better?

Sleep-friendly foods for shift workers include dairy and carbohydrate-rich foods containing tryptophan — such as bananas, milk, yoghurt, eggs, honey, and low-fat cheese — which support melatonin production. Magnesium-rich foods such as dark leafy greens, beans, nuts, and seeds also promote relaxation. Light snacks like whole-grain toast, oatmeal, or a small smoothie are good options close to sleep. Avoid heavy, fatty, or spicy meals within 2 to 3 hours of bed, and cut caffeine, alcohol, and nicotine before sleeping.

What is the ideal sleep environment for a shift worker sleeping during the day?

The most important factors are darkness, quiet, and temperature. Use blackout curtains or an eye mask to block daylight. Use sleep headphones or a white noise machine to mask daytime noise. Keep the room between 16 and 20 degrees Celsius (60 to 67 degrees Fahrenheit), which is the temperature range most conducive to deep, restorative sleep. Avoid using the bedroom for work or stressful activities, and limit blue-light exposure from screens for at least one hour before sleep.

Should shift workers nap, and if so how long?

Strategic napping can benefit shift workers. A nap of 20 to 30 minutes boosts alertness without causing sleep inertia (the grogginess that follows longer naps) or significantly affecting your main sleep period. Night shift workers may benefit from a split sleep approach — a longer sleep after work and a short nap before the next shift. Keep nap timing and duration consistent to avoid disrupting your overall sleep pattern.

Where can shift workers in the automotive industry get support for sleep problems?

Ben offers free, confidential support for shift workers in the UK automotive industry, including guidance on sleep, stress, and mental health. Call 08081 311 333 or visit ben.org.uk to chat online. Ben's SilverCloud digital platform also provides free programmes covering sleep, stress, and mental wellbeing for automotive employees. If sleep difficulties persist, speak with a GP or occupational health professional, or call NHS 111 for advice.