Recent research has shown that a later bedtime for teens may result in weight gain. This includes staying up late night on weekends as well.
Researchers analyzed data from over 3,300 American teens. They found that an extra hour of late bedtime was associated with a body mass index (BMI) increase of more than 2 points. BMI is a measurement of body fat based on height and weight.
“The results are important because they highlight adolescent bedtimes, not just total sleep time, as a potential target for weight management concurrently and in the transition to adulthood,” first author Lauren Asarnow, a doctoral candidate at the University of California, Berkeley, said in a news release from the American Academy of Sleep Medicine.
The study does not prove a cause and effect relationship between being a night owl and being overweight.