In 1979 Americans worked an average of 8-9 hours per day. In 2014, more people are working 24/7, on weekends, and even while on vacation—an average of 5 additional weeks each year. In addition, Americans sleep less than ever before. One-third of adults routinely get 6 hours of sleep or less each night. This combination of overwork and sleep deprivation can be harmful to health. Chronic work overload doubles the risk for developing heart disease.