Every night the Walt Disney World theme parks close their gates and the crowds go home, the most important hours of the Disney day begin. Big lights go up, and massive crews of workers repair and clean every ride, every walkway, and every concession stand. When the gates open the next morning, the parks are completely renewed. The trash from the previous day is gone, and the roller coasters are in top condition again.
A similar thing happens every night in your body. During those precious hours your body shuts down and repairs itself. Your immune system recharges. Your major organs are restored. Old cells are being replaced with new ones. Your mind relaxes and orders its thoughts, creating a healthy mental state.
What if Walt Disney World stayed open all night or let people in at 3:00 a.m., cutting short the repair time? The park would eventually be unsafe, unsanitary, and unappealing. It would end up a run-down shadow of itself, careening toward financial disaster and, worse, causing injuries or deaths on rides that were not maintained properly.
Lack of sleep is just as disastrous for you as an individual. A good night’s sleep restores, repairs, and rejuvenates your body. Sleep is important because it is vital for your immune system and your overall health. Sleep also slows down the aging process. Lack of sleep increases your risk of developing type 2 diabetes as well as a host of other diseases.