Calculating LT1 and LT2 approximately without a blood test?

[tshortt]

@AJS914

They are going by power in steps to cross DFA a1. I think the way to go is by HR. My power at DFA a1 can vary quite a bit based on freshness but it tracks pretty accurately with HR whether I’m fresh or fatigued.

Agree. This has been my experience as well. And also why I don’t say or think “power at AeT any more than I say power at VO2max”. There is a range, no doubt, but in this context I usually want to get a sense of strain, not stress/output.

@AJS914

and Seiler’s 60-70% of HRmax.

I think he estimates 60-70% of HR Reserve, not HRmax, right?