Is repetition in training more important than variation?
There can be such a thing as too much repetition, of course. But everyone knows this. During an eight-year meathead phase of my early adult life, when I lifted weights five or six hours a week with no goal other than getting girls, I did the same workouts over and over with no variation and, predictably enough, after an initial adaptation period my body stopped making any progress. The same thing would happen in an endurance training program with no variation. But I believe that many endurance athletes could benefit from including more repetition in their training.