Agree. I’d say context matters, too, though. It’s HARD, if not impossible, to always stick to an interval training approach. I mean all a runner did was run intervals, he/she would probably get injured. So, there’s a time in a place for deep focus work. My coauthor and I go into a lot more detail on this in the book. Hope you consider reading it!

Bestselling author of Peak Performance and The Passion Paradox. Co-Creator of The Growth Equation. Coach to executives, entrepreneurs, and MDs.

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