Time Trial / Time Trialling / TT

How is this relevant, unless you know his maximum and LTHR?

Oddly I was thinking about your turbo / road LTHR dichotomy posted about elsewhere when I was doing a turbo session last night, and it struck me that when you race or TT you should probably not have access to your heart rate data as I think it might constrain your performance.

You could say the same for any feedback. Having power or hr or pain might make you slow down but that's not necessarily a bad thing, if it stops you blowing up.