Sleep · Section 2 of 8
The science
Key idea
“Stable sleep improves the operating conditions for almost every other health behaviour.”
Sleep influences glymphatic clearance in the brain, hormonal rhythm, immune function, and tissue repair.
When sleep is chronically restricted or poor-quality, the effects show up across metabolism, mood, cognition, and long-term disease risk.
The useful practical lesson is simple: stable sleep improves the operating conditions for almost every other health behaviour.