Rachmaninoff once urged Horowitz to go for long walks. “If you don’t walk, your fingers will not run.”
Abram Chasins, “The Return of Horowitz”, The Saturday Evening Post, October 22, 1966, p.102-3.
Cited in: Gerig, Reginald (1974) Famous Pianists and Their Technique. Washington: Robert V. Luce, p.307.