Sleep

Microbiologist Explains Why Dogs Shouldn't Be Allowed in Bed

Microbiologist Reveals How Often You Should Change Your Bed Sheets

Your bed is a paradise for mites and germs: a microbiologist explains how to keep it hygienic and how frequently to change bed sheets.

The first night in a hotel, sleep often doesn't come easily.

What Lies Behind It Why You've Likely Experienced the 'First Night Effect'

The first night in a new environment often leads to poor sleep. The reason is the "first night effect," which is well-researched.

Sleep can apparently influence body fat—at least indirectly.

Study Late Risers Tend to Have More Body Fat–Here’s Why That Might Be

Sleep can affect body fat. The key factor seems to be whether you're an early bird or a night owl. Here's what a study has shown.

Pill for Sleep Apnea? A man lies snoring next to a woman in bed, who has placed a pillow over her head.

Assessment by Charité Professor Pill Instead of CPAP? New Study Offers Hope for Sleep Apnea Patients

Researchers have tested a pill as an alternative to sleep masks for treating sleep apnea. An expert from Charité shares his assessment.

Study Shows If This Happens at Night, the Risk of Erectile Dysfunction Increases

What is the connection between sleep apnea and erectile dysfunction? A new review summarizes the current state of research.

Orthosomnia When "Perfect Sleep" Becomes an Obsession

Tracking sleep can become an obsession. Experts refer to this phenomenon as orthosomnia.

Matthias Steiner in an Interview with FITBOOK Editor-in-Chief Nuno Alves at OMR 2026 in Hamburg

Olympic Hero in Interview Matthias Steiner: "This Is the Key Lever for Healthy Aging"

Olympic champion Matthias Steiner explains in an interview with Nuno Alves why sleep is the most crucial factor for healthy aging.

Sleep Expert Reveals The Only Thing That Truly Helps Me With Sleep Problems

An evening routine is relaxing. FITBOOK editor Melanie Hoffmann finds that exercise, in particular, helps her fall asleep well at night.

New Study on Sleep, Sleep Patterns, and Brain Health

Observational Study Certain Sleep Patterns May Increase the Risk of Brain Damage Later in Life

A new study links sleep patterns to brain aging in healthy individuals—three notable sleep habits were examined.

According to a Study What Your Saliva Can Reveal About Your Sleep

Can a saliva test determine if you've had enough sleep? A study provides initial intriguing insights into this possibility.

Woman Drinks Caffeinated Coffee and Disrupts Her Sleep

According to a Study How Caffeine Changes Sleep–Even When You Think You're Sleeping Well

Caffeine affects sleep according to a new review, even if individuals don't notice it. Find all the details at FITBOOK.

Why Do We Sometimes Twitch When Falling Asleep?

Many people struggle with sleep problems. According to Prof. Satchin Panda, this is partly because we don't allow ourselves enough time to wind down.

Interview Chronobiologist Satchin Panda: "Why So Many Struggle With Sleep Problems"

Chronobiologist Satchin Panda explains in an interview why many people have sleep problems and why melatonin is often overdosed.

Woman sitting in front of a daylight lamp

Doctor Answers Can Daylight Lamps Help With "Seasonal Affective Disorder"?

Daylight lamps promise relief from winter depression - also known as "seasonal affective disorder". A doctor explains the benefits.

Nocturnal Mind Racing What Happens in the Brain While We Dream?

What actually happens in the brain when we dream? And how can memory be trained? Experts have the answers.

The type of light in the evening can affect the release of the sleep hormone melatonin, according to a study.

Study Summary What Evening LED Light Does to the Sleep Hormone Melatonin

A study analyzed how factors such as LED light in the evening affect the release of melatonin.

The timing of your last coffee of the day should ideally be chosen so that it doesn't interfere with your sleep.

Caffeine and Its Effects Drinking coffee late at night can significantly disrupt your sleep.

Caffeine not only disrupts falling asleep but also affects sleep quality. When you should have your last cup of coffee to ensure a good night's sleep.

Sleep is linked to health and, conversely, to diseases.

Revolutionary AI Model Researchers Can Predict Risk for 1,000 Diseases Based on Sleep

Researchers were able to link sleep to around 1,000 diseases and predict disease risks using an AI model.

Study Shows Harmful Impact of Sleep Disorders on Mental Health

Study Shows This Factor Negatively Affects the Mental Health of People Over 45

The sleep disorder sleep apnea affects physical health—and according to a study, it also contributes to mental health disorders.

Sleep is important for longevity, apparently even more significant than exercise or diet.

Criteria in Comparison Study Identifies Key Longevity Factor

Beyond diet or exercise—a new longevity study highlights the importance of adequate sleep for a long life.

Studies suggest a link between magnesium and sleep.

"Highway to Health: A Study Overview" The Connection Between Magnesium and Sleep

A review article highlights the close connection between magnesium and sleep quality and disorders—and how supplementation might help.

Menopause can be accompanied by sleep disturbances.

Tips From Experts What Really Helps With Insomnia During Menopause?

During menopause, many women struggle with sleep disturbances. Learn here what truly helps improve sleep.

Daylight Saving Time Increases Risk of Strokes

According to a Study Abolishing Daylight Saving Time Can Prevent Strokes and Obesity

Daylight saving time burdens many people and can increase the risk of strokes and obesity. Why isn't it abolished?

According to a Study From Parkinson's to Cirrhosis: 172 Diseases Linked to Poor Sleep

Irregular sleep increases the risk of diseases like diabetes and depression. A new study shows clear links

NDSR, developed by Andrew Huberman, can reduce stress, improve sleep, and be more restorative than a nap.

NSDR (Non-Sleep Deep Rest) How to Reduce Stress with Non-Sleep Deep Rest

What is non-sleep deep rest? FITBOOK examines the practical technique to enhance focus, sleep quality, and calmness.

Yoga Nidra offers more benefits than a nap, and research indicates it has many positive aspects.

"Yogic Sleep" A Few Minutes of Yoga Nidra Can Boost Sleep and Performance

Studies show: Yoga Nidra promotes sleep and reduces stress. FITBOOK reveals why you should incorporate yoga nidra into your daily routine.

What Do Foods Have to Do With Nightmares?

Research Surprising! How Evening Consumption of Milk and Cheese Affects Sleep

A recent study examines whether dairy products can cause restless sleep and nightmares. FITBOOK provides insights.

Bedroom: There's a Test to Determine Your Chronotype

Biological Sleep Rhythm Early, Late, or Normal? Take the Chronotype Test!

In sleep research, there are three sleep types: early, late, or normal. Which one are you? Take the chronotype test!

Adhering to specific dietary rules can apparently have a direct impact on sleep quality.

By up to 16 percent Simple Dietary Rule Improves Sleep the Same Night

Want to sleep well tonight? A new study suggests following a simple dietary rule to improve sleep quality.

Health Risks Melatonin for Kids Tested! "Stiftung Warentest" Advises Against All Products

Melatonin Products for Children Often Incorrectly Dosed, Unsafely Packaged, and Potentially Harmful, Says Stiftung Warentest