HAVIT Blog
Guias baseados em ciência sobre hábitos, sono, nutrição e movimento.
Recentes · 62 artigos
The Humidity Sweet Spot for Sleep: Why 40-50% Might Save Your Airways
Keep bedroom humidity between 40-50% RH to hydrate airways without feeding dust mites—your respiratory system's overnight sweet spot.
Why Your Body Jerks Awake When You're Falling Asleep (And How to Stop It)
Hypnic jerks happen when your brain misinterprets muscle relaxation as falling—caffeine, stress, and sleep debt make them worse, but simple fixes work.
Magnesium Glycinate vs Threonate for Sleep: Which Form Actually Crosses Your Blood-Brain Barrier?
Magnesium threonate crosses the blood-brain barrier more efficiently, but glycinate's GABA-enhancing glycine may produce faster sleep onset for most people.
When to Take Melatonin Based on Your Chronotype: The DLMO Timing Guide
Night owls should take melatonin 5-6 hours before desired sleep; early birds need only 2-3 hours—timing based on your natural DLMO makes supplementation 73% more effective.
Mouth Breathing During Sleep: The Hidden Health Problems Wrecking Your Rest in 2026
Sleeping with your mouth open starves your brain of oxygen, dries out your mouth, and makes snoring worse—but simple nasal retraining can reverse most damage within weeks.
Mouth Breathing During Sleep: How to Stop It With Myofunctional Therapy and Nasal Hygiene
Myofunctional therapy combined with proper nasal hygiene can help most mouth breathers transition to nasal breathing within 8-12 weeks, dramatically improving sleep quality.
The Science of Nap Length: Why 26 Minutes Beats 30 for Productivity
A 10-26 minute nap maximizes alertness without grogginess; 90 minutes works for creative tasks but requires planning.
The Science of Bedroom Temperature for Deep Sleep: Your 2026 Season-by-Season Guide
Your optimal sleep temperature depends on your body composition and the season—most people thrive between 60-68°F, with adjustments needed as core temperature naturally drops 2-3°F during deep sleep.
Orthosomnia: When Your Sleep Tracker Becomes the Reason You Can't Sleep
Orthosomnia affects 28% of regular sleep tracker users—here's how to use your device without letting it hijack your sleep.
Pillow Height by Sleep Position: The Shoulder-Width Formula for Cervical Alignment
Side sleepers need pillow height equal to shoulder-to-neck distance (typically 4-6 inches); back sleepers need 3-4 inches to maintain neutral cervical curve.
Polyphasic Sleep Schedules: What 2025 Research Reveals About Safety and Whether They Actually Work
2025 research shows polyphasic sleep schedules cause measurable cognitive deficits and metabolic disruption that persist even after reported 'adaptation.'
Positional Sleep Apnea: Why Side Sleeping Works (And When It's Enough)
For position-dependent sleep apnea, lateral sleep devices can reduce breathing interruptions by 50-80%, offering a CPAP alternative for many patients.