HAVIT Blog
Guides fondés sur la science pour les habitudes, le sommeil, la nutrition et le mouvement.
Récents · 89 articles
How to Start Exercising Again After Long Illness Fatigue: A Science-Backed Return Protocol
Traditional 'push through it' exercise advice backfires after viral illness—here's the modified graded approach that actually works.
When to Start Exercising After Giving Birth: A Week-by-Week Recovery Protocol for 2026
Most women can begin gentle movement within 24-48 hours postpartum, but returning to pre-pregnancy exercise intensity typically takes 12-16 weeks following a structured progression.
Your Protein Absorption Ceiling: Why Age, Gut Health, and Activity Level Change Everything
Your true per-meal protein ceiling depends on age, gut microbiome diversity, and training status—not a universal 30g rule.
Why Your Friend Recovers Faster Than You (And How to Find Your Own Training Rhythm)
Stop copying workout programs—track your HRV and sleep patterns to discover the training frequency your unique physiology actually needs.
Daily Routine Structure for Remote Workers: Replacing Lost Zeitgebers in 2026
Remote work strips away the natural time cues your body relies on—replacing them deliberately is the key to sustainable work-from-home routines.
Your Satiety Signals Might Be Lying to You: A Guide to Portion Control Based on Hormone Sensitivity
Your brain's response to fullness hormones determines whether intuitive eating works for you—or sets you up to overeat by 400+ calories daily.
SAD Winter Depression: How to Time Exercise and Light Therapy for Maximum Mood Benefits
Exercising outdoors in morning light, then using a light box in late afternoon, can boost serotonin production by up to 47% more than either intervention alone.
Your Personal Alcohol Threshold: When One Drink Starts Wrecking Your REM Sleep
Your REM sleep disruption threshold depends on body composition, genetics, and timing—most people can find their personal limit within 0.02% BAC accuracy through systematic tracking.
Your Sleep Cycle Isn't 90 Minutes: How to Find Your Real Number and Wake Up Sharp
Finding your individual sleep cycle length (not the assumed 90 minutes) and timing your alarm to cycle completion can eliminate morning grogginess.
Your Personal Sleep Pressure Formula: How to Time Naps Without Wrecking Tonight's Sleep
Your sleep pressure builds at a personal rate—find your number, and you'll know exactly when napping helps versus hurts.
Sleep Need Phenotype: Why Your Optimal Duration Isn't 8 Hours (And How to Find It)
Genetic mutations like DEC2 allow some people to thrive on 4-6 hours while others genuinely need 9+ hours—forcing yourself into the wrong category causes real harm.
Why Your Friend Falls Asleep in 10 Minutes While You Need 2 Hours to Wind Down
Genetic and nervous system differences mean some people need 30 minutes to wind down while others require 2+ hours—matching your routine to your type improves sleep onset by up to 47%.