Zone Two Training
Emphasizing the importance of Zone Two training, Rich discusses how this discipline fosters greater mitochondrial density, crucial for ultra-endurance athletes. By training at a controlled pace, one can develop efficiency and endurance without the need for speed work, ultimately teaching the body to metabolize fat as a primary fuel source. This approach leads to significant improvements in performance over time, allowing for sustained energy during long efforts.In this clip
From this podcast

Tim Ferriss Show
Rich Roll — Reinventing Your Life at 30, 40, and Beyond | The Tim Ferriss Show
Related Questions
What is the science behind Zone 2 training as discussed in the episode Rich Roll — Reinventing Your Life at 30, 40, and Beyond | The Tim Ferriss Show and the clip Understanding Zone Two?
Can you explain more about Zone Two training as discussed in the episode Rich Roll — Reinventing Your Life at 30, 40, and Beyond | The Tim Ferriss Show and the clip Understanding Zone Two?
Why do endurance runners spend most of their time in zone 2?