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About Sleep

Sleep is the body’s most important source of recovery – it strengthens the immune system, supports concentration, and restores emotional balance. Yet many people experience sleep problems or don’t really know how to improve their sleep.

In the sleep² blog, you’ll find clear, research-based insights on sleep and sleep health. We explain how healthy sleep works, what the different sleep stages mean, and why regular sleep times are so essential. You’ll learn how stress, diet, exercise, and light affect your sleep quality – and what practical steps can help you fall asleep faster and wake up more refreshed.

Alongside everyday tips, we share findings from current sleep research and modern sleep analysis. We explore what sleep trackers can really tell you, what science has discovered about sleep, and how this knowledge can be applied to your daily life.

Theresa Hauser, MSc. | 07.11.2025

Is it possible to live permanently with 4–5 hours of sleep? – The science behind short sleepers

Some people claim they can get by with only four to five hours of sleep. But is that really true? Fi...

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