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Matthew Walker2024
Why We Sleep
The science of sleep and why it is the single most important health behaviour available to us.
INSIGHTS & IMPLICATIONS
01
Sleep is not passive recovery — it actively consolidates memory, clears metabolic waste, and regulates emotional response.
02
Chronic sleep deprivation below 7 hours compounds invisibly: cognitive impairment accumulates while subjective tiredness flatlines.
03
Takeaway: Sleep is the highest-leverage performance input, yet the one most culturally rewarded to sacrifice.