Internal Infographic: 3 in 10 workers fall asleep at their desks Two-thirds of Americans do not feel well-rested. Such lack of sleep can cause car accidents, heart attacks, and augment hunger levels. By Regina WoodJuly 19, 2012 SHARE How many hours did you sleep last night? According to an infographic by termlifeinsurance.org, the average U.S. adult sleeps six hours and 55 minutes each night, but needs eight hours of sleep. To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.