Your resting heart rate may reveal far more about your health than you realize. In this video, Dr. Alex explains why your resting heart rate is one of the strongest predictors of cardiovascular health and lifespan, and what different numbers actually mean. Learn how autonomic balance, fitness level, metabolic health, sleep, and stress influence your heart rate at rest. Discover the optimal resting heart rate range for longevity and simple evidence-based strategies to improve it naturally. Understanding this single number could help you protect your heart and extend your healthy lifespan.