Does TrainerRoads structured workout approach and progressive overload principles truly provide a measurable and sustained improvement in performance for cyclists, or is it simply a matter of consistency and dedication to any training regimen that yields results? What specific metrics or benchmarks would be most telling in evaluating TrainerRoads effectiveness, and are there any notable studies or data that support or refute its claimed benefits? How does TrainerRoads emphasis on high-intensity interval training (HIIT) hold up against other methodologies, such as traditional base-building or endurance-focused training, in terms of producing tangible gains for cyclists? Can the TrainerRoad platform be just as effective for experienced riders looking to fine-tune their performance as it is for newer cyclists seeking to build a strong foundation?