An inactive state resembling deep sleep in which certain animals living in cold climates pass the winter. In hibernation, the body temperature is lowered and breathing and heart rates slow down. Hibernation protects the animal from cold and reduces the need for food during the season when food is scarce. Compare estivation.
Does Dreaming Indicate a Good Nightâs Sleep? Dreams are typically indicative of a good nightâs sleep, demonstrating that you have passed through the light sleeping phase (NREM) and entered into a deep sleep (REM).
Good sleep is a sign of good health. If sleep is poor, this is a sign of imbalance in the body. Regularly disturbed sleep can affect not only your energy level and mood, but also your health because sleep helps strengthen the immune system. Sleep is as important to your health as diet and exercise.