HAVIT Blog
Science-backed guides on habits, sleep, nutrition, and movement.
All articles
MALS Syndrome: When Eating Becomes Agony and Doctors Can't Find Why
MALS is a rare vascular compression syndrome where a ligament squeezes your celiac artery, causing severe abdominal pain after eating—and it's often dismissed for years.
When Your Meds Make You Tired: A Pharmacokinetic Guide to Exercise Timing
Your medication's fatigue peak is predictable—schedule workouts during its trough period for 40-60% better exercise tolerance.
How to Track Medication Timing and Adherence: Finding Your Optimal Dose Windows in 2026
Connecting your medication logs with symptom tracking reveals personal timing patterns that generic schedules miss—here's how to find yours.
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.
Menstrual Cycle Exercise Adaptation by Phase: A 2026 Training Guide Based on Sports Science
Your hormones create four distinct training windows each month—matching workout intensity to each phase can improve performance by up to 23%.
Your Metabolism Shifts Up to 300 Calories Across Your Menstrual Cycle—Here's How to Train and Eat for Each Phase
Your body burns different amounts of energy and responds differently to exercise depending on where you are in your cycle—here's how to optimize both.
Menstrual Cycle Metabolism and Weight Fluctuation: What Each Phase Does to Your Body
Metabolic rate rises 5-10% in the luteal phase while water retention can add 2-4 pounds—timing nutrition to your cycle helps manage both.
Tracking Exercise Performance Across Menstrual Cycle Phases: A 2026 Guide to Smarter Training
Your menstrual cycle creates predictable performance windows—track the right metrics in each phase to train smarter, not just harder.
Menstrual Cycle Phase Exercise Optimization: The Complete Training Protocol for 2026
Matching your training intensity to menstrual cycle phases can unlock 15% better strength gains during follicular phase and improved endurance during luteal phase.
Menstrual Cycle Training Periodization: Your Complete Phase-by-Phase Workout Protocol
Sync your training intensity with your four menstrual phases—push hard during follicular, peak during ovulation, moderate during luteal, and recover during menstruation.
Mental Contrasting and WOOP: The Goal Achievement Method That Actually Works in 2026
WOOP (Wish, Outcome, Obstacle, Plan) doubles goal achievement rates by forcing you to visualize success AND the specific barriers standing in your way.
How to Reverse Diet After Calorie Restriction Without Regaining Weight: The 2026 Protocol
Increase calories by 5-10% weekly over 8-16 weeks to reverse metabolic adaptation without significant fat regain.
