Sleep duration plays a critical role in metabolic health, particularly in regulating insulin sensitivity and cardiometabolic risk. Both insufficient and excessive sleep have been linked to insulin resistance and metabolic disorders. However, association between weekday sleep duration and insulin sensitivity remains unclear.
Understanding how sleep patterns influence metabolic markers such as estimated glucose disposal rate (eGDR), a validated surrogate of insulin resistance, may provide insights for improving metabolic health.
A recent study published in BMJ Open Diabetes Research & Care demonstrated a nonlinear relationship between weekday sleep duration and insulin sensitivity, with weekend catch-up sleep exerting a modifying effect. The study showed that 7.32 hours of weekday sleep is associated with optimal eGDR and insulin sensitivity; moderate weekend catch-up sleep benefits short sleepers but may be harmful in those without sleep debt (see Graphic).
(Source: Fan Z, Wei R, Chen T, Yan X, Yin S, Cao Y, Akinyemi LI, Zhong J, Shi H, Zhang F. Association of weekday sleep duration and estimated glucose disposal rate: The role of weekend catch-up sleep. BMJ Open Diabetes Res Care. 2026 Mar 3;14(2):e005692. Doi: 10.1136/bmjdrc-2025-005692.)