Study: 7 Hours, 18 Minutes of Sleep Cuts Diabetes Risk
The Spin
Narrative A
Sleeping exactly 7 hours and 18 minutes nightly may be the metabolic "sweet spot," helping reduce insulin resistance, the precursor to type 2 diabetes. This corresponds to the highest average eGDR, indicating optimal insulin sensitivity. Weekday sleep below this can be partly offset by 1–2 hours of weekend catch-up, but sleeping beyond the sweet spot or oversleeping on weekends worsens glucose regulation, highlighting the importance of consistently hitting 7 hours 18 minutes each night.
Narrative B
The claim that 7 hours 18 minutes is a precise "sweet spot" overstates the evidence. The study relied on self-reported sleep and cannot prove causation. While moderate sleep — roughly 3.5 to 7.5 hours per night — has been associated with lower diabetes risk, there is no exact optimum, and sleeping beyond this range didn’t clearly worsen insulin sensitivity, meaning the strict 7h18m target should not be taken as a definitive prescription for preventing diabetes.