Everyone knows climbing hills improves your muscle strength and speed. Combine them with a short tempo run and you'll not only challenge your cardiovascular system, you'll strengthen your glutes and improve your running efficiency overall. Making you the king or queen of the virtual mountain.
*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?.