How far should Zwift workouts be adjusted downward from the prescribed intensities when a rider has been training consistently but hasnt achieved the same level of fitness as others in their category? Are the default Zwift workout intensities based on an unrealistic expectation of a riders fitness level, forcing many to scale back the intensity to make the workouts manageable, or should riders be pushing themselves harder to reach the prescribed intensities, even if it means risking burnout or overtraining? If someone has been training with Zwift for months but still cant complete certain workouts at the recommended intensity, does that mean theyre just not cut out for structured training, or is there a flaw in the way the workouts are designed? Should Zwift be providing more options for customization, such as the ability to adjust the intensity of individual intervals within a workout, rather than having to scale back the entire workout? How common is it for riders to have to scale back the intensity of Zwift workouts, and what are the implications for their fitness goals if theyre not able to complete the workouts as prescribed?