Lionel Sanders says 'Green Days are moderately few and far between when you're in the midst of heavy training. So, if you have the luxury of planning your training around how well you have recovered and slept, you definitely want to utilize these green days to do the really hard workouts, like this one!'
*From Zwift 1.49 (early October 2023), Zwift has decided to reorganize its workout library into new collections. Use More workouts like this to find identical workouts in new workout collections or training plans in Zwift. Workouts that are no longer available in Zwift can be downloaded from the official Zwift forum. See more info here: FAQ: How do I obtain and use old Zwift workouts that are no longer available in Zwift?.