Restricting sleep to 5–6 hours for a single week reduces insulin sensitivity by roughly 20–30% in controlled studies and raises ghrelin while lowering leptin, which reliably increases calorie intake. Weekend catch-up sleep partially repays the debt but does not restore glucose control if the pattern repeats. 'Social jetlag' — a weekend midpoint shifted 2+ hours later than weekdays — behaves metabolically like flying two time zones every Friday.
Measured at Longevity Cliniq
See your own Sleep Debt & Social Jetlag number.
Every Longevity Cliniq panel includes the markers that drive healthspan, interpreted by a physician — across Dubai, Abu Dhabi and the wider UAE.