Isnt it concerning that Zwifts interval training tools are often touted as a magic bullet for improving cycling performance, yet theres a lack of concrete evidence to support the claim that their pre-designed workouts are actually tailored to an individuals specific fitness level or goals? Whats the point of having a plethora of interval training options if Zwifts algorithms cant accurately assess a riders current fitness state and adapt the workouts accordingly? Shouldnt we be questioning the effectiveness of Zwifts interval training tools, rather than blindly following the prescribed workouts and expecting miraculous improvements in our performance? Are there any Zwift users who have actually seen significant gains in their performance using the interval training tools, and if so, what specific workouts and settings did they use to achieve those gains?