New Scientist Podcasts
Weekly: How to finally get a good night’s sleep - with science
Feb 28, 2025
Catherine de Lange, a sleep science expert, and Alison George, a science journalist focused on the microbiome, dive into the intricacies of our sleep patterns. They challenge the belief that modern humans sleep less than hunter-gatherers, revealing surprising truths about sleep efficiency. The duo discusses the elusive nature of sleep debt and its effects on health, alongside the fascinating link between our gut microbiome and sleep quality. They also evaluate sleep tech, including trackers, and share dietary tips to enhance sleep, from polyphenol-rich foods to gut health.
36:59
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Quick takeaways
- Despite common beliefs, individuals in industrialized societies actually tend to get slightly more sleep than hunter-gatherers, pointing to modern safety as a factor in sleep efficiency.
- The connection between gut health and sleep quality suggests that maintaining a diverse microbiome can positively influence sleep, emphasizing the importance of dietary choices.
Deep dives
The Importance of Sleep and Sleep Debt
Understanding the significance of sleep is crucial for overall health, as consistent lack of sleep can lead to serious long-term consequences. Sleep debt occurs when individuals do not get enough sleep over time, which can manifest as irritability, mood swings, and cognitive deficits. For example, research shows that individuals who average six hours of sleep or fewer may experience cognitive impairments equivalent to missing two entire nights of sleep. Recognizing the signs of sleep debt, such as reliance on alarm clocks or noted changes in behavior, can help individuals address their sleep needs.
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