Workouts» Rachel 'Ruby' Zambrano» Run Workouts » 4 minute threshold intervals10min from 75 to 85% FTP4x 4min @ 100% FTP,2min 30sec @ 75% FTP10min from 82 to 75% FTP 10min from <span data-value="75.449997" data-unit="relpow">75</span> to <span data-value="85.45" data-unit="relpow">85</span>% FTP4x 4min @ <span data-value="100.44999" data-unit="relpow">100</span>% FTP,<br /> 2min 30sec @ <span data-value="75.449997" data-unit="relpow">75</span>% FTP10min from <span data-value="82.449996" data-unit="relpow">82</span> to <span data-value="75.449997" data-unit="relpow">75</span>% FTPWorkout overviewDistance: 2.76 kmZone distributionZ1: 0 mZ2: 681 mZ3: 1119 mZ4: 960 mZ5: 0 mZ6: 0 m 0% 25% 41% 35% 0% 0%Author: Rachel "Ruby" ZambranoThreshold interval workout similar to a 4 x (800 meter threshold/400 meter recovery) utilizing Zambrano Power Zones and the Stryd power meter for running. Workout by Rachel 'Ruby' Zambrano of Peaks Coaching Group. Download workout More workouts like thisFAQ: How to use custom workouts in Zwift? Back to top