More sleep may improve insulin resistance

Participants provided a fasting blood glucose and a sleep log, and wore a wrist actigraph. On weekdays the adolescents averaged 6.4 hours per night, as measured by the actigraph.

The shorter the sleep, the more elevated the insulin resistance, independent of race, age, gender, waist circumference and body mass index.

The authors calculated that if an adolescent who typically got six hours of sleep per night could add an extra hour, their insulin resistance would improve by 9%.

Fragmented sleep was associated with