Daniel Coyle - I discovered when I went all out, when I put 100 percent of my energy into

I discovered when I went all out, when I put 100 percent of my energy into some intense, impossible task - when my heart was jack-hammering, when lactic acid was sizzling through my muscles - that's when I felt good, normal, balanced.

- Daniel Coyle

source: Daniel Coyle, Tyler Hamilton (2012). “The Secret Race: Inside the Hidden World of the Tour de France: Doping, Cover-ups, and Winning at All Costs”, p.19, Random House

topic: Heart, Energy, Tasks, Lactic Acid, Sizzling