Bedtimes linked to increased risk of obesity in teen girls

A new study about sleep finds girls with irregular sleep schedules have an increased risk of obesity. Dr. Jennifer Ashton explains the findings.
1:59 | 09/17/19

Coming up in the next {{countdown}} {{countdownlbl}}

Coming up next:

{{nextVideo.title}}

{{nextVideo.description}}

Skip to this video now

Now Playing:

{{currentVideo.title}}

Comments
Related Extras
Related Videos
Video Transcript
Transcript for Bedtimes linked to increased risk of obesity in teen girls
Now to that health alert. A new study about sleep finding teenage girls with irregular sleep schedules have an increased risk of obesity. Dr. Jen Ashton is back. 800 boys and girls. Here's a study appeared in Jama pediatrics and gave the teenagers trackable wristbands, followed their sleep behaviors over a period of time and analyzed the data looking at two interesting variable something called chrono type and social jet lag how we modify our sleep schedule based on something that's going on in our social what we do during the week versus the weekends. The findings were interesting and found out for girls just a one-hour difference in their social jet lag, this is the amount of time that not that they were asleep but when they went to sleep and when they woke up resulted in a larger waist circumference on average 1.2 centimeters larger and higher body fat percentage. They did not find these findings in boys and this was independent of the total amount of sleep these teenagers got. The implications are for heart disease and the risk factor. What should parents do? We need to prioritize sleep. I say it over and over again. It has a pr problem. We look at it like it's fluff. It is a medical necessity. The most important thing for sleep hygiene stick to a regular schedule. That means on the weekends basically what you do during the week, make your environment cold, dark and quiet. Power down off those devices especially important for teens abouten an hour before bed and minimize what you're eating and drinking also an hour before bed because we need that sleepnd teens need it even more. I got a blackout shade. Life changing. Unbelievable. You can tell a difference. Oh. Thank you. Oh. Oh, please.

This transcript has been automatically generated and may not be 100% accurate.

{"duration":"1:59","description":"A new study about sleep finds girls with irregular sleep schedules have an increased risk of obesity. Dr. Jennifer Ashton explains the findings.","mediaType":"default","section":"ABCNews/GMA","id":"65662646","title":"Bedtimes linked to increased risk of obesity in teen girls","url":"/GMA/Wellness/video/bedtimes-linked-increased-risk-obesity-teen-girls-65662646"}