But, should I target 85% of my FTP heart rate, or 85% of the Kurt power curves. I know that a lot of outside factors can influence my heart rate, but because of that, isn't that a more accurate determiner of exertion or stress? I could do my training at 85% of my heart rate, but not 85% of my power. What are your thoughts?
How much riding have you done prior to your FTP test?