Power > RPE > HR
Wow, really? I would have thought that training in HR zones with a well calculated LT would be much better than going on perceived exertion (which is what I do all the time as I don’t have a HR monitor)
Yep, RPE is better than HR.
The physiological response above the below the ‘LT’ (this is not technically correct – but that is another discussion) is very different.
Below the ‘LT’ – hold a steady power and the HR is (reasonably) stable.
At and/or above the ‘LT’ – hold a steady power and HR increases as a function of time. Hold a steady HR and power drops as a result.
To ride ‘fast’ you will pace yourself around the LT – so the observations above raise their ugly head.
Someone pacing purely on RPE *tends* to do a better job/go faster than someone pacing *purely* on HR. But of course, there are always exceptions – which tend to come with their experience level and/or the duration of exercise.