What are the common characteristics or trends among athletes who have achieved significant success with TrainerRoads structured workouts, and how can others effectively replicate these strategies to achieve similar breakthroughs in their own training regimens? In what ways do the most successful athletes adapt and modify the workouts to suit their individual needs, and what role does data analysis and tracking play in their overall training approach? Are there any specific workout plans or phases within the TrainerRoad program that seem to produce more dramatic improvements in performance, and if so, what is it about these particular workouts that contributes to their effectiveness?