Your fitness tracker already knows a lot about you — your heart rate, your sleep score, your recovery, even your stress.But how much of that data is accurate? And how much actually matters?In this episode of The Modern Physician, Dr. Vishvaraj Rathod looks beyond steps, scores, and smart rings to explain the truth behind HRV, VO₂ max, sleep staging, calorie burn, and recovery metrics.You’ll learn what these numbers really mean, why they fluctuate, when to trust them — and when to trust your body instead.A calm, evidence-based guide for anyone using a smartwatch, smart ring, or fitness tracker.

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