I've hardly heard this discussed, but WatchOS is supposed to have a special mode for track workouts. I've only heard it mentioned by DC Rainmaker. Does anyone know if the feature would be available on the Series 4 watch? This is what Apple says:
Updates for Runners
Apple Watch is already a powerful tool for runners, and watchOS 9 brings more data and features to help track how efficiently users run. New running form metrics, including Stride Length, Ground Contact Time, and Vertical Oscillation, can all be added as metrics on Workout Views. These metrics appear in the Fitness app summary and in the Health app, where users can see trends over time and learn from patterns.
A new Pacer experience lets users choose a distance and goal for the time in which they want to complete a run, and calculates the pace required to achieve the goal. During the workout, they can follow the pace alerts and metrics provided. Coming later this year, Race Route enables users to race against their best or last result on frequently completed routes, and receive in-session pacing guidance. A new Track running experience, coming later this year to the US, automatically detects that users are at a running track, and uses Apple Maps data along with GPS to provide the ultimate pace and distance metrics for runners.
Source: https://www.apple.com/newsroom/2022/09/watchOS-9-is-available-today/