Sleep Science and Chronotype Resources
Research-based articles on chronotypes, circadian rhythms, and sleep science. Every article is sourced from peer-reviewed studies.
For informational purposes only. Not a substitute for professional medical advice.
Do Sunrise Alarm Clocks Actually Work?
Waking gradually with light seems like it should make mornings easier. Here is what the research shows about waking, sleep inertia, and circadian timing.
Read article →How Long Does It Take to Shift Your Body Clock?
Moving your bedtime and moving your circadian timing are two different things. Here is what the research shows about how far the body clock actually shifts, and how quickly.
Read article →Should You Take Melatonin?
Melatonin is often treated like a sleeping pill, but it works more like a timing signal to your body clock. Here is what it does, when it helps, and when it will not.
Read article →How to Sleep After a Night Shift
If you've ever tried the usual advice for sleeping after a night shift and still struggled, the missing pieces are often your body clock and your schedule. Here's how they shape your sleep.
Read article →Why Do I Wake Up Before My Alarm?
Waking a few minutes before your alarm can feel uncanny. It is not. As morning approaches, the balance between sleep and wakefulness shifts, and a regular wake time makes the timing more predictable.
Read article →Why Can't I Fall Asleep Earlier?
Going to bed earlier rarely makes you fall asleep earlier. Two systems decide when you fall asleep, sleep pressure and your body clock, and here is how they work together.
Read article →Can You Become a Morning Person?
Can you become a morning person? The honest answer depends on what you are trying to change: your body clock, your sleep schedule, or how your mornings feel.
Read article →Night Owl, or Just a Habit? How to Tell the Difference
Some of being a night owl is written into your biology, and some is built from habit and light. Here is what research says about which is which, and how much of it you can actually change.
Read article →Do Blue Light Glasses Actually Help You Sleep?
Blue light glasses are sold as a sleep aid, but the evidence is thinner than the marketing suggests. Here is what research shows about evening light, screens, and the glasses themselves.
Read article →Why Morning Light Matters for Your Body Clock
Morning light is the strongest signal your body clock receives. Learn what research says about how light sets your circadian rhythm, why timing matters, and what it means for your chronotype.
Read article →What Is Social Jet Lag? The Science Behind Why Mondays Feel So Hard
Social jet lag is the mismatch between your biological clock and your social schedule. Here is what research says about why it makes Mondays feel heavy.
Read article →Why Do I Crash in the Afternoon? The Science Behind the Energy Dip
The afternoon slump is real, biological, and not caused by lunch. Learn what research says about why it happens, how your chronotype shapes the timing, and what helps.
Read article →What Is a Chronotype? The Science Behind Your Body Clock
Your chronotype is your biological tendency to sleep and feel alert at certain times of day. Learn what the research says about chronotypes, circadian rhythms, and what shapes your body clock.
Read article →Find your body clock type
The free quiz takes under 2 minutes. Find out whether your body clock runs earlier, later, or somewhere in between.
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