Once again, a study confirms that too little or too much sleep is bad for you.
This report, published in the medical journal Sleep, shows a link between sleepers who get less than 7 or more than 8 hours of sleep per night and weight gain over time. Getting less sleep increased risk more than getting extra sleep did.
Three Things You Need to Know:
1. This study is higher quality than most--it followed individuals for six years, comparing hours of sleep to changes in body mass index. One...