HAVIT Blog
Guides fondés sur la science pour les habitudes, le sommeil, la nutrition et le mouvement.
Récents · 1086 articles
Commitment Devices That Actually Work: How Precommitment Strategy Effectiveness Changes Everything
Commitment devices work by making your future self unable to back out—and research shows financial stakes of $50-100 triple success rates compared to willpower alone.
Compounded Semaglutide vs Brand Wegovy: What the 2025 FDA Data Actually Shows About Safety
FDA testing found 30% of compounded semaglutide samples had purity issues, while brand Wegovy maintains 99.5%+ consistency—but the full safety picture is more nuanced than headlines suggest.
Concurrent Training Interference Effect: How to Build Muscle Without Cardio Killing Your Gains
Strategic timing and cardio modality selection can reduce strength interference by up to 50% when combining endurance and resistance training.
Cardio and Weights Same Day: The Interference Effect Science Nobody Explains Properly
The AMPK-mTOR interference effect is real but manageable: separate cardio and weights by 6+ hours or do strength first to preserve 94% of your gains.
Concurrent Training Interference: How to Combine Cardio and Strength Without Losing Gains
Separate cardio and strength by 6+ hours, prioritize strength first, and keep cardio low-impact to minimize the interference effect.
Why Your Wake-Up Time Matters More Than Your Bedtime for Better Sleep
Fixing your wake time—not your bedtime—is the most powerful lever for regulating sleep pressure and adenosine buildup.
The 4-Week Same Wake Time Challenge: Why Your Weekend Sleep-Ins Are Sabotaging Monday
Waking up at the same time every day—including weekends—can reduce social jet lag by 73% and improve metabolic markers within 4 weeks.
Contrast Therapy Hot Cold Protocol: The 3:1 Ratio That Actually Works for Recovery
Alternate 3 minutes hot (38-40°C) with 1 minute cold (10-15°C) for 15-24 minutes to significantly reduce muscle soreness and speed recovery.
Cortisol Awakening Response: How Your First 30 Minutes Shape Your Entire Day's Stress
The cortisol awakening response (CAR) is a 50-75% hormone surge in your first 30 minutes awake that predicts your stress resilience all day—and you can optimize it.
The 90-Minute Morning Window: How to Lower Cortisol Naturally After Waking
The first 90 minutes after waking determine your stress trajectory for the entire day—here's how to optimize each phase.
Creatine from Food vs Supplements: Why You'd Need 2 Pounds of Steak Daily
Getting 5g of creatine from food alone would require eating roughly 1kg of raw beef daily, making supplementation the only practical option for performance doses.
Should You Take Creatine While on Wegovy? The Muscle-Sparing Strategy Worth Knowing
Creatine supplementation during Wegovy use can help preserve 1-2 lbs more lean mass over 12 weeks when combined with resistance training—a meaningful edge during rapid weight loss.