Originally Posted by
ericm979
Coggan's "e-wang" chart is not meant to show what w/kg is needed for cat 4, 3, etc. It's meant as a way to compare your relative strengths for different time periods. I.e if you have a "cat 1" 5 second power and a "cat 5" ftp then you need to work on your ftp in order to do well in longer races, or race to your strengths, or both.
That's exactly what I use it for: (1) changes over time, and (2) an indication of my power profile, so I know what to focus on, and where I'm most likely to succeed.