What if the widespread emphasis on Zone 2 for endurance training is actually a simplified approach that doesnt fully capture the complexity of how pro cyclists develop muscle memory for pacing during long events? Do pro cyclists truly spend the majority of their training time in Zone 2, or is it more of a rough guideline thats often misunderstood or oversold by coaches and cycling media? How much time do they actually spend in Zone 2 versus other zones, and is there a specific type of workout or training phase where Zone 2 is more emphasized? Are there any notable counterexamples of successful pro cyclists who dont rely heavily on Zone 2 training, and if so, whats their alternative approach? Could it be that the key to their success lies in a more nuanced understanding of pacing and endurance, one that incorporates a wider range of training zones and techniques?