Join host Julia Cartwright on Stamina as she explores the remarkable adaptations happening inside your body during endurance training—from mitochondrial growth and increased capillary density to improved heart efficiency and raised lactate threshold. Backed by research from Cleveland Clinic and NIH, Julia explains why consistency matters, how strength training enhances running economy, and why your VO2 max predicts longevity, not just performance.

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This content was created in partnership and with the help of Artificial Intelligence AI