once you’ve sensed yourself as powerful, it changes the way you look at an obstacle in your way. Would Johnson have thought of herself as someone who could move a tree without the experience of kettlebell training? I sent her a message asking if she thought there was a connection. “When the tree presented itself, I felt invincible,” she wrote back. It was as if her nervous system took stock of the fallen tree, recalled the euphoric feeling of swinging a forty-four-pound bell, and remembered that she is someone who can take on a giant.