What are some effective strategies for using Zwifts metrics to inform anaerobic training sessions, and how can riders use these metrics to tailor their workouts to specific goals, such as increasing power output or improving sprint performance? Are there any specific Zwift metrics that are particularly valuable for anaerobic training, and how can riders use these metrics in conjunction with other training data to get a more complete picture of their fitness and performance? Additionally, are there any common pitfalls or mistakes that riders should avoid when using Zwifts metrics for anaerobic training, such as relying too heavily on average power or neglecting to incorporate proper recovery and cooldown protocols into their workouts?