Which platform, Zwift or TrainerRoad, do you think is more effective for VO2 max training, and why? Some argue that Zwifts gamification and social features make it a better motivator for pushing riders to their limits, while others claim that TrainerRoads structured workouts and precise power targets are more effective for making actual gains. But what about the idea that Zwifts more varied and dynamic workouts are actually better for simulating the unpredictable nature of real-world racing, and therefore more effective for building true VO2 max fitness? Or is that just a bunch of nonsense, and TrainerRoads scientific approach is the clear winner? Is it possible that the best approach is actually a combination of both, or do you think one platform is clearly superior to the other?