Research

Hormonal

Short sleep duration (<6 hours/night) is associated with an increased risk of developing type 2 diabetes and hypertension, independent of obesity, through mechanisms involving impaired glucose tolerance and insulin resistance.

Aim for 7-9 hours of sleep to protect your metabolic health. Chronic short sleep is linked to a higher risk of developing type 2 diabetes and high blood pressure, even if you maintain a healthy weight. Prioritizing sleep is a key preventive health strategy.

GoodSupportsHIGH confidence
Several experimental studies of sleep restriction observed an effect on markers of glucose metabolism... glucose tolerance was 40% lower after six nights of 4-h bedtimes... insulin sensitivity was reduced by 11–20%... prospective studies... reported increased odds of diabetes associated with short sleep duration.
Kristen L. Knutson · American Journal of Human Biology · 2012

Why this rating

Strong experimental evidence for acute metabolic changes and prospective observational data for disease incidence, though causality in long-term observational studies is harder to prove.

Source

Does inadequate sleep play a role in vulnerability to obesity?

Kristen L. Knutson · American Journal of Human Biology · 2012

DOI 10.1002/ajhb.22219

narrative_reviewCited 239×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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