Originally Posted by
merlinextraligh
The shortest, least painful way is to do two 3 mile TT's, ( or 2 8 minute efforts on the trainer) Do it after a good warm up, 10 minutes recovery between efforts.
Take 92% of your average HR for the 2 efforts and that's a pretty good measure of your LTHR.
Thanks, I'll take it into account, too.
Today I tried the method with 30 km after warming and measure the average of the last 20 km. The average was 160 bpm. As a matter of facts, the muscles failed first at the middle of the distance, then the back of the right knee became the bottle neck during the last kilometers. So, I don’t know how accurate it was…