Well I’ve gotta say that anyone who can do Charing in Erg mode is a stud(ette). I’m admittedly not doing this as part of the plan progression, but will be participating in a university study doing 6 30 s all out efforts separated by 4 min recoveries and Charing fit he bill. I was asked to do 2 of these workouts prior to the study. I’m on a dumb trainer so I don’t have to worry about erg being too tough, but I’m still almost 100 watts off the target! Yikes