New research suggest a 30-minute nap is all it takes to reserve the hormonal impact of night of poor sleep. This is the first study that found napping could "restore biomarkers of neuroendocrine and immune health to normal levels." Lack of sleep is recognized as a public health problem. Insufficient sleep can contribute to reduced productivity as well as increased vehicle and industrial accidents, according to the U.S. Centers for Disease Control and Prevention. People who sleep too little are more likely to develop chronic diseases such as obesity, diabetes, high blood pressure, and depression. The findings support the development of practical strategies for addressing chronically sleep-deprived employees.