When I prepared to climb Rhapsody, the first E11 trad route in the world (and also my first 8c+!) my endurance training was really simple. Personal anecdotes from training have their limitations but many of you ask me how I train endurance and in the absence of good science to guide us, I keep it pretty simple based on principles of basic physiology. My books on training for climbing : 9 out of 10 climbers https://www.davemacleod.com/shop/9outof10climbers Make or Break https://www.davemacleod.com/shop/makeorbreak My Patreon: https://www.patreon.com/davemacleod The fingerboard protocol I mentioned in this video is described in these two videos: https://www.youtube.com/watch?v=gCIyoS10s3g https://www.youtube.com/watch?v=PebF3NyEGPc