Calculating LT1 and LT2 approximately without a blood test?

ok here you go, at 88% LTHR which is the upper end of my endurance/zone2 riding as mentioned above:

Timeframe power at 88% LTHR Notes
2017 204W self-coached “go long” double century A event and TTE of 60+ minuites
2019 159W 2nd year of TR, injured April-August but clearly struggling
2022 209W 2nd year of coaching with endurance+stuff approach
last 6 weeks 227W starting 3rd year of coaching with endurance+stuff approach

Felt and easily noticed the recent fitness bump. FWIW turned sixty this year and seventh year road cycling. YMMV and all that. No year averaged more than 8 hours/week. Huge amount of intensity in late winter / early spring 2017, which led to some crash&burn weeks but I had the base fitness to pick myself back up and keep going. Last two years its been boring old endurance plus a lot of intensity stuff, consistency for the win.

Everybody is different. Focusing on metabolic fitness is working well for me.

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