In this episode of The Macro Hour, Nikkiey Stott sits down with health expert and bestselling author JJ Virgin for a powerful conversation about muscle, metabolism, and what it really takes to thrive as you age. Together, they break down why muscle is one of the most important predictors of long-term health, how resistance training supports fat loss and metabolic function, and why so many women have been misled when it comes to cardio, nutrition, and body composition. They also dive into bloo...