There’s More to Power than Just FTP.
Before diving into another season of training on the bike, or jumping into serious training for the first time, it helps to know a few things about your current fitness as you get started…
Where is my fitness at right now? Identify a baseline from which you plan to improve.
What are the best ways to spend my training time? In order to maximize your improvement.
What effort levels should you should be training at? Set your training zones.
These insights can be found through power testing on the bike. For many years, a rider’s FTP (Functional Threshold Power) has been the focal point of where a rider’s fitness is and from what to set their training zones from. FTP works well. It shines light on one area of fitness and can be re-tested again and again to check for improvement.
By definition, your FTP is the power you could sustain for one hour, full gas. I say could sustain because who’s going to go all-out for an hour to find this value? So it’s become common place to go hard for 20-minutes and subtract 5% from your average power. Pretty much the Gold Standard, and everybody accepts it. Even going all-out for 20 minutes is pretty tough on your own, so more recent models are doing either one or two 8-minute intervals and subtracting 5-10% from those averages to estimate FTP. All said and done, these methods of FTP testing highlight one energy system (v02 max) and calculate the FTP from a “one size fits all” percent reduction from the test effort. From here, it doesn’t tell you much else. Does it work? Sure. However, if you’re like me, you would likely prefer more.