Hormonal
Chronic partial sleep restriction (less than 7 hours per night) increases the risk of type 2 diabetes by inducing insulin resistance and impairing glucose tolerance through hormonal and neural mechanisms.
Prioritize getting 7 or more hours of sleep per night. This is not just about feeling rested; it is a critical metabolic lever. Short sleep directly impairs your body's ability to process glucose and manage insulin, significantly increasing your risk for type 2 diabetes and obesity, independent of diet and exercise.
Evidence is rapidly accumulating to indicate that chronic partial sleep loss may increase the risk of obesity and diabetes. Laboratory studies in healthy volunteers have shown that experimental sleep restriction is associated with an adverse impact on glucose homeostasis. Insulin sensitivity decreases rapidly and markedly without adequate compensation in beta cell function, resulting in an elevated risk of diabetes.
Why this rating
The paper synthesizes multiple high-quality laboratory studies (randomized cross-over designs) and prospective epidemiologic studies, though it acknowledges limitations in self-reported sleep data.
Source
<i>Associations between Sleep Loss and Increased Risk of Obesity and Diabetes</i>
Kristen L. Knutson et al. · Annals of the New York Academy of Sciences · 2008
DOI 10.1196/annals.1417.033
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