Sleep is a symptom of caffeine deprivation.
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Free-running sleep means: Go to sleep when tired. Wake up without an alarm. Early studies on circadian rhythm showed that our internal cl... -
Zeitgeber (from German for "time giver," or "synchronizer") is any exogenous (external) cue that synchronizes an organis... -
Dream imagery is convincingly real and vivid. There’s depth, color, dimension, and experience interwoven into dream imagery. An apple in a d... -
I’m a religious napper. I rarely go a day without one. According to Sara Mednick, PhD , napping will allow you to: Increase alertness Mak... -
Jet lag is far, far less intense flying west than it is flying east. Flying west you follow the sun and extend your day. For some reason, i... -
A circadian rhythm is an endogenously driven roughly 24-hour cycle in biochemical, physiological, or behavioural processes. Circadian rhyth... -
Levels of cortisol, the “stress hormone,” spike in the morning and decrease throughout the day. Cortisol levels should be as low as possible... -
One of the greatest expenditures of energy in the body is from digestion of food. Large amounts of blood flow are directed toward the digest... -
Keep wake-up times consistent and sleep quality will improve dramatically, giving you more energy and decreased sleep need. Your body has ... -
I realized I was dreaming. I raised my arms and began to rise… I rose through black sky that blended to indigo, to deep purple, to lavender,...