What Is Circadian Rhythm? - Sleep Foundation
2024年3月15日 · Perhaps the most well-known circadian rhythm is the sleep-wake cycle, which determines how sleepy or alert you feel throughout the day and night. We cover how circadian rhythms work, particularly in connection with sleep, along with how to prevent and address disruptions to your circadian rhythms.
Stages of Sleep: What Happens in a Sleep Cycle
2023年12月8日 · Each sleep stage plays a part in allowing the mind and body to wake up refreshed. Understanding the sleep cycle also helps explain how certain sleep disorders, including insomnia and obstructive sleep apnea, can impact a person’s sleep and health.
Sleep Drive and Your Body Clock - Sleep Foundation
2024年3月1日 · Your natural sleep-wake cycle is regulated by an internal clock: your circadian rhythm. Sleep drive, or the need for sleep, increases the longer you are awake. Aging, hormone imbalances, and disruptions to your circadian rhythm can increase your sleep drive.
How Sleep Works: Understanding the Science of Sleep
2020年10月23日 · The body regulates sleep with two key drivers: sleep-wake homeostasis and the circadian alerting system. Sleep-wake homeostasis. This technical term describes something most of us know implicitly from experience: the longer you’re awake, the …
How to Fix Your Sleep Schedule
2023年12月8日 · To gradually adopt a new sleep schedule, you can make adjustments in 15 or 30 minute increments over a series of days. You can also focus first on the wake-up time, creating one fixed part of your schedule, and then use good sleep hygiene habits to incrementally get used to falling asleep at your desired bedtime.
Melatonin: Usage, Side Effects, and Safety - Sleep Foundation
2024年3月22日 · Melatonin is a hormone that regulates the sleep-wake cycle. Supplementary melatonin can help you fall asleep or adjust to new time zones. Experts recommend a dosage of 1 to 5 milligrams of melatonin about 30 minutes before bed.
Sleep Calculator: Your Personalized Tool for Sleep
Use the sleep calculator to develop an optimal sleep schedule based on your unique biology and lifestyle preferences, including your age and either your bedtime or wake-up time. The sleep calculator is simple to use and ensures your schedule allows ample time for rest.
Sleep for Teenagers - Sleep Foundation
2023年10月4日 · Experts believe this is a two-fold biological impulse affecting the circadian rhythm and sleep-wake cycle of teens. First, teens have a sleep drive that builds more slowly, which means they do not start to feel tired until later in the evening.
What Happens When You Sleep: The Science of Sleep - Sleep …
2009年12月22日 · During a normal sleep period, you progress through four to five sleep cycles. Each sleep cycle is made up of four individual sleep stages. The four stages of sleep are further broken down into two categories: rapid eye movement (REM) and non-REM sleep.
Adenosine and Sleep: Understanding Your Sleep Drive - Sleep …
2023年12月14日 · Once you fall asleep, adenosine is believed to prolong deep sleep or slow-wave sleep. This stage of sleep plays a restorative role and allows your body to recover from sleep deprivation. While you sleep, the brain converts adenosine back into ATP, essentially eliminating your sleep drive.