Centralive Blog
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Not All Wearable Metrics Are Created Equal: A Closer Look at Energy Expenditure
Is your wearable lying about calories? New research shows a 30% error rate in energy expenditure metrics. Learn how to use digital health data with rigor.
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Your Watch’s VO2max Is Lying to You — But That Might Be Okay
If you wear a Garmin, Apple Watch, Fitbit, or Whoop, there’s a good chance you’ve glanced at its VO2max estimate and either felt smug or slightly insulted. That number — the gold-standard measure of cardiorespiratory fitness — has become one of the most prominent metrics on the consumer wrist. Here’s the uncomfortable truth from the […]
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The Number That Predicts How Long You Will Live
The strongest predictor of your lifespan isn’t cholesterol or blood pressure—it is your VO2max. Discover why this ‘hidden vital sign’ is your ultimate survival project.
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Just Wearing a Tracker Makes You Move More
Before you glance at a single number, the act of putting a device on your wrist is already changing how you behave. Here is what the science says — and why it matters. There is a peculiar effect that happens when you strap a fitness tracker to your wrist for the first time. You have […]
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Beyond the Pulse: The New Science of Precision VO2 Tracking
Discover how Firstbeat’s neural network model uses R-R intervals and respiration to boost VO2 estimation accuracy by 48% over standard heart rate monitoring. Garmin uses Firstbeat Analytics to calculate VO₂ max.
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𝗛𝗼𝘄 𝗔𝗰𝗰𝘂𝗿𝗮𝘁𝗲 𝗶𝘀 𝗬𝗼𝘂𝗿 𝗚𝗮𝗿𝗺𝗶𝗻 𝗩𝗢𝟮 𝗠𝗮𝘅?
Is your Garmin VO2 Max lying to you? Discover the science behind wearable accuracy vs. lab-grade testing and why that number matters for your long-term health.
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Understanding MET: Debunking 5 Common Misconceptions in Exercise Science
Think 1 MET is the same for everyone? Think again. Discover the 5 biggest myths about Metabolic Equivalent of Task and how to track your fitness data smarter.
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Understanding the New WHO Guidance on Physical Activity Measurement
New WHO guidelines standardize wearable data protocols. Learn why wrist-worn devices and 7-day monitoring are now the gold standard for global health research.
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The Definitive Framework for HRV Data Quality and Reporting
Stop guessing your HRV data quality. Learn the defensible thresholds for missingness and the essential reporting bundle for clinical and research HRV analysis.
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The HRV Illusion: Why the Wrist You Choose Changes Your Data
Think your smartwatch data is identical on both wrists? Think again. Discover why left vs. right PPG signal differences can ruin your HRV data and how to fix it.
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