"I train myself mentally with visualization. The morning of a tournament, before I put my feet on the floor, I visualize myself making perfect runs with emphasis on technique, all the way through to what my personal best is in practice.... The more you work with this type of visualization, especially when you do it on a day-to-day basis, you'll actually begin to feel your muscles contracting at the appropriate times."
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Source : Camille Duvall, Nancy Crowell (1992). “Camille Duvall's Instructional Guide to Water Skiing”, p.205, Simon and Schuster