Maybe has something to do with the new “Active Recovery” zone which is mentioned in the workout here (even though these are not found under that filter).
Sprint workouts aren’t going away, but Sprint as a standalone zone has been removed with the new updates. We’ll work on adding an easier way to find these workouts in the coming weeks.
Also, sprint workouts displaying “Active Recovery” and 0.0 scores are known bugs that we’re working on fixing.
Possibly, but reason why I like SIT, is different – I usually do 2-3 week SIT block at the beginning of new year as mental refresher (long chill recovery periods + 30s max effort bursts) before starting real plan to improve endurance.
Anaerobic attacks are more serious work, not as relaxed