This podcast episode discusses the secrets to healthy aging with Mark Sisson, an anti-aging expert. Sisson emphasizes the importance of maintaining daily movement, prioritizing social connections, and adopting a diet that supports metabolic flexibility. He also highlights the benefits of resistance training for building muscle mass, the role of collagen for muscle healing, and the effectiveness of fat training for endurance athletes. The episode stresses the need for periodization in muscle growth and recovery, and emphasizes the importance of resistance training not just for aesthetics but for supporting various activities and enhancing quality of life.