Sleep Science Blog
Evidence-based articles to help you understand and improve your sleep.
How to Sleep Better With Anxiety: 10 Evidence-Based Strategies
Anxiety and sleep problems feed each other in a vicious cycle. Here's how to break it with science-backed techniques for better rest.
Best Mattress for Better Sleep in 2026: What the Science Says
Discover how your mattress affects sleep quality and what to look for when choosing the best mattress for your sleep style and budget.
7 Sleep Supplements That Actually Work (According to Research)
Not all sleep supplements are created equal. We reviewed the research on 7 popular supplements to tell you which ones actually improve sleep — and which are hype.
Best Sleeping Position: Side, Back, or Stomach — What Science Says
Which sleeping position is actually best? Side sleeping wins for most people, but the details matter. Here's what the research says about back pain, snoring, acid reflux, and pregnancy.
What Your Chronotype Means for Your Sleep, Health, and Productivity
Your chronotype — whether you're a morning lark or night owl — is largely genetic and has profound effects on your sleep, health, and performance.
How Much Sleep Do You Need? Complete Guide by Age, Sex, and Lifestyle
How much sleep do you really need? NSF and CDC recommendations by age group, plus the surprising factors — genetics, sex, exercise, and illness — that change your personal target.
How to Nap Without Feeling Groggy: The Science of Perfect Naps
Learn why naps make you feel groggy and exactly how long to nap to wake up refreshed. Includes the NASA-approved nap formula.
Does Melatonin Actually Work? The Science Behind Sleep's Most Popular Supplement
Melatonin is the world's most popular sleep supplement — but does it actually work? We break down the research on timing, dosage, and who benefits most.
Shift Work Sleep Disorder: Causes, Symptoms, and Solutions
Shift work sleep disorder affects millions of night and rotating shift workers. Learn the causes, symptoms, and science-backed strategies to sleep better on any schedule.
The Sleep-Weight Connection: How Poor Sleep Leads to Weight Gain
Discover the science linking sleep deprivation to weight gain, increased appetite, and metabolic changes — and how to fix it.
Sleep Debt: How to Calculate It and Actually Pay It Back
Sleep debt accumulates faster than you think — and you can't fully recover it with one long weekend sleep. Learn how to calculate your sleep debt and the most effective recovery strategies.
Sleep Deprivation Effects: What Happens to Your Brain and Body Without Sleep
What actually happens when you don't get enough sleep? From the first 24 hours to chronic deprivation, here are the real effects on your brain, immune system, hormones, and long-term health.
15 Sleep Hygiene Tips Backed by Science (That Actually Work)
Science-backed sleep hygiene tips to help you fall asleep faster, sleep deeper, and wake up refreshed every morning.
How to Fall Asleep Fast: 12 Science-Backed Methods That Actually Work
Struggling to fall asleep? Learn 12 proven techniques to fall asleep faster, from the military sleep method to 4-7-8 breathing, cognitive shuffling, and environment optimization.
How Much REM Sleep Do You Need? A Complete Guide to Dream Sleep
Learn how much REM sleep you need by age, what happens during REM sleep, and 8 proven ways to get more REM sleep each night for better memory and mood.
How to Get More Deep Sleep: 10 Evidence-Based Strategies
Not getting enough deep sleep? Learn 10 proven strategies to increase your deep sleep, from exercise timing to temperature optimization and supplement research.
How Much Sleep Do Women Need? A Guide to Women's Sleep at Every Stage
Women need 7-9 hours of sleep, but hormonal changes across the menstrual cycle, pregnancy, and menopause create unique sleep challenges. Learn what science says about women's sleep needs.
Biphasic and Polyphasic Sleep: Can You Hack Your Sleep Schedule?
Everything you need to know about biphasic and polyphasic sleep schedules, from the siesta to Uberman. Learn what science says about splitting your sleep into multiple sessions.
How to Fix Your Sleep Schedule: A Science-Backed Guide to Resetting Your Internal Clock
Learn how to fix your sleep schedule with proven strategies rooted in circadian rhythm science. Covers light exposure, melatonin timing, consistency habits, and practical tools to help you fall asleep and wake up on time.
Why Do I Wake Up Tired? 9 Reasons You Feel Groggy Every Morning
Discover the science behind why you wake up tired even after a full night of sleep. Learn about sleep inertia, sleep cycles, sleep debt, and how to wake up feeling refreshed.
How Much Deep Sleep Do You Need? A Complete Guide by Age
Learn how much deep sleep you really need, why it matters for recovery and memory, how age affects it, and science-backed tips to get more restorative slow-wave sleep every night.