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The impact of biological rhythms on conditions such as jetlag and shift work, including their negative effects and symptoms like fatigue: • jetlag, which involves psychological and physical effects from rapid travel across time zones • shift work, which refers to work schedules that vary between day and night, often outside standard hours.

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Cambridge IGCSE PsychologySleep and dreams

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The impact of biological rhythms on conditions such as jetlag and shift work, including their negative effects and symptoms like fatigue: • jetlag, which involves psychological and physical effects from rapid travel across time zones • shift work, which refers to work schedules that vary between day and night, often outside standard hours

This point belongs to Biological rhythms, natural cycles of bodily processes regulated by a person’s internal ‘clock’,, especially Biological rhythms, natural cycles of bodily processes regulated by a person’s internal ‘clock’, outcomes.
You need to be able to the impact of biological rhythms on conditions such as jetlag and shift work, including their negative effects and symptoms like fatigue: • jetlag, which involves psychological and physical effects from rapid travel across time zones • shift work, which refers to work schedules that vary between day and night, often outside standard hours.
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Impact of Shift Work

Shift work can lead to various health issues due to the disruption of biological rhythms. Workers often experience fatigue, sleep disturbances, and increased stress levels.

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Define Define the term 'shift work'.
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Related learning objectives

Biological rhythms are natural cycles of bodily functions governed by an internal clock, specifically including: • circadian rhythms, which are the sleep-wake cycle repeating every 24 hours • ultradian rhythms, which are cycles occurring multiple times within a 24-hour period.
Biological rhythms, natural cycles of bodily processes regulated by a person’s internal ‘clock’, outcomes
Different types of sleep within the sleep cycle, focusing on their duration and features such as brain activity, muscle tension, eye movements, and dreams, including: • rapid eye movement (REM) sleep • non-rapid eye movement (nREM) sleep. Knowledge of specific stages of sleep is not required.
Biological rhythms, natural cycles of bodily processes regulated by a person’s internal ‘clock’, outcomes
The nature of dreams, which encompass thoughts, feelings, images, and narratives experienced during sleep.
Biological rhythms, natural cycles of bodily processes regulated by a person’s internal ‘clock’, outcomes
Methods for assessing sleep characteristics, including: • EEG (electroencephalography) • EMG (electromyography) • EOG (electrooculography) • dream reporting.
Biological rhythms, natural cycles of bodily processes regulated by a person’s internal ‘clock’, outcomes
The influence of external factors, known as exogenous cues (zeitgebers), on biological rhythms in the sleep-wake cycle, such as light and social interactions.
Biological rhythms, natural cycles of bodily processes regulated by a person’s internal ‘clock’, outcomes

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