Why are there so many workouts that are almost the same?

[DaveWh]

@apond58

For example, a standard SS WO might be 3 x 15 @ 86% of FTP with 6 min RI @ 50%. If you could customize your progression to increase the number of intervals, interval length, % of FTP, RI length etc you could control the rate of increasing stress to a level you could handle.

I’d imagine it would be pretty easy to do this in the workout creator?

If you follow the plans, you also get a good idea of this progression eg on VO2max, bluebell to mills to Spencer.