I did my first track workout in forever (I've never been one to run on a track) yesterday! The workout went something like this: 1 mile warmup, 6x400's (7-10 max effort) with alternating recovery 400's, and 1 mile cooldown.
It was interesting to do a true speed workout! I definitely am not that familiar with running on a track, and definitely also got out of my running comfort zone. I was gassed by the end, and didn't pace myself super well throughout my effort laps (essentially started out too fast, and paid for it by the end), but I felt very accomplished at the end. I did it with a run club that meets there every Wednesday, so I think I'm going to try to incorporate it into my weekly workout schedule.