What are some effective strategies for utilizing Zwifts segment effort analysis to optimize training and improve overall performance, and how can riders incorporate this data into their workout routines to achieve specific goals, such as increasing endurance or boosting sprint speed? Are there any specific metrics or data points within the segment effort analysis that riders should focus on, and how can they use this information to make data-driven decisions about their training? Additionally, are there any best practices for comparing segment effort analysis data across different rides or workouts, and how can riders use this comparative data to track progress and adjust their training plans accordingly?