It’s definitely a topic amongst scientists and the health and fitness world... The impact of Stress.

Sleep is an essential biological function with major roles in recovery, energy conservation, and survival. Sleep also appears to be important for vital functions such as neural development, learning, memory, emotional regulation, cardiovascular and metabolic function, and cellular toxin removal. It is clear that good-quality sleep is critical for good health and overall quality of life. - ATS

Our personal preference when it comes to sleep?

Lights Out.