I have Afib. I’m always in Afib. My Dr. says that I shouldn’t raise up my HR above 160. This means that interval training is mostly out for me. Most of the threshold workouts and for sure VO2 max workouts cause my HR to go up, way up, over 220 bbm. Dr. said I shouldn’t do that! So trying to do intervals means as soon as I hit 160 I stop the interval. So far nothing has worked for me to be able to do VO2 max or threshold workouts and even Sweetspot workout will cause me to go over 160. I don’t know what to do as I feel I’m not getting more fit.
I would be happy to help!