What if muscle wasn't about vanity, but survival? In this episode, we explore the revolutionary concept of "musclespan", the maintenance of muscle tissue throughout life as the single most powerful longevity intervention. Discover how skeletal muscle functions as a dynamic endocrine organ, secreting anti-inflammatory myokines that combat aging, regulate metabolism, and protect cognitive function. We break down the sarcopenia threat (muscle loss accelerating to 15% per decade after 60), reveal simple at-home assessment tests, and provide actionable, science-backed strategies combining resistance training and protein optimization. Whether you're 18 or 78, learn why your muscle is your biological independence account and how to make deposits that compound into decades of autonomy, strength, and metabolic resilience. From glucose regulation to brain health, this episode reframes muscle as medicine, and it's never too late to start.