And, for overweight teenagers, the health repercussions could be serious.
A new study finds heavy teens with poor sleep habits could have disruptions in insulin secretion and blood sugar.
Researchers suspect getting better shuteye might help hold off the development of type 2 diabetes.
In order to keep glucose levels stable, teens need between 7 and a half and 8 and a half hours a night.
Quality also matters, meaning teens need to experience the right sleep stages too.
There is more on this research in the journal Diabetes Care.