The title grabbed me too.....
A new study has shown that those who are sleep deprived during childhood are significantly higher risk for becoming obese as adults.
Researchers studied the sleep times of 1,037 boys and girls ages 5, 7, 9 and 11 from April 1972-April 1973. When they were 32 years old they measured their body mass index (BMI). Outcome: Shorter childhood sleep times were significantly associated with higher adult BMI values, even after adjusting for other potential factors, such as socioeconomic status, parental weight or physical activity/television viewing.
Bottom line: Tell them to turn the lights and get to sleep!