I just use the same HR inside and out and don’t worry about power. Luckily I only have a 530 and can’t get the DFA1 data to pop up. I say luckily because I’ve gone down the road of being too “sciency” with this stuff and it takes away from training enjoyment. So I take the 123-124, keep it below 120 and I feel confident I’m below LT1. Also, per Plews - being in the correct HR zone illicits the correct physiological benefits regardless of power - so if it’s hot then yea power lower, if cold likely higher.
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