How much do people value the decoupling figure? What sort of length of ride do people do to determine a decoupling figure? can / could and increasing decoupling figure over a short space of time indicate fatigue? Is monitoring decoupling over a base building period worthwhile?
My decoupling is generally about 1% - 3% over a 2hr 75%FTP ride, would this indicate that over 2hr's my base is pretty much as good as it's going to get?
I don't value it at all. Your cardiac output is a mixture of heart rate and volume. Tracking how just one of those changes over time is meaningless as far as I can see. As you don't know how the other changed, it's meaningless to track one thing.