HAVIT Blog
Guias baseados em ciência sobre hábitos, sono, nutrição e movimento.
Recentes · 98 artigos
Calorias Ativas vs Calorias Totais Queimadas: O Que Seu Rastreador de Fitness Realmente Mede
As calorias totais incluem a queima basal do seu corpo (TMB) mais atividade; foque em tendências semanais em vez de números diários para insights significativos.
Minutos Ativos vs Passos: Qual Métrica de Saúde Realmente Prevê Quanto Tempo Você Vai Viver?
Minutos ativos capturam intensidade de exercício que os passos não captam—mas 7.000+ passos ainda vencem para redução de mortalidade por todas as causas em pessoas que odeiam treinos estruturados.
Activity Streak Psychology: When Habit Tracking Helps (and When It Backfires)
Research shows streaks peak in effectiveness around 21-66 days before diminishing returns kick in—and strategic streak breaks can actually strengthen long-term habits.
Why That Glass of Wine Crashed Your Glucose at 3 AM: CGM Patterns Explained
Alcohol blocks liver glucose production, causing crashes 6-8 hours later—CGM tracking reveals your personal tolerance window.
Apple Watch AFib Detection: What the Real-World Data Actually Shows Beyond FDA Trials
Apple Watch catches most AFib cases but flags many false alarms in healthy people—understanding these numbers helps you respond appropriately to alerts.
Why Your Apple Watch and Garmin Show Different Resting Heart Rates (It's Not a Bug)
Apple Watch and Garmin use different measurement windows and averaging algorithms, which explains why your resting heart rate can differ by 5-10 bpm between devices.
Apple Watch Ultra 3 VO2max Accuracy vs Lab CPET: What the 2025 Algorithm Actually Gets Right
Apple Watch Ultra 3's 2025 algorithm hits within 5.2% of lab CPET for most users, but accuracy drops significantly in highly trained athletes above 60 ml/kg/min.
Apple Watch vs Garmin Swimming Stroke Detection: Which Actually Counts Your Laps Right in 2026?
Garmin edges out Apple Watch for pool lap counting (97% vs 94%), but Apple wins in open water distance accuracy with its newer GPS algorithms.
Athlete Glycemic Optimization: Your CGM Race Day Fueling Protocol for Peak Performance
Real-time CGM glucose targeting between 120-160 mg/dL during endurance events can prevent bonking and optimize performance through personalized carb timing.
Blood Glucose Variability Without Diabetes: Why Your A1C Might Be Lying to You
Your blood sugar can spike and crash dramatically while maintaining a 'perfect' A1C—and these hidden swings may predict metabolic problems years before traditional tests catch them.
Blood Oxygen Level Tracking: What's Normal at Altitude and During Exercise
Normal SpO2 ranges from 95-100% at sea level but can safely drop to 88-92% at high altitude or during intense exercise—knowing the difference prevents unnecessary panic.
Why Does Blood Pressure Vary So Much at Home? The Science Behind Those Confusing Numbers
Home blood pressure naturally fluctuates 20-30 mmHg daily due to circadian rhythms, activity, and stress—systematic logging patterns matter more than any single reading.