Mikael Eriksson on HR-Based Training

What this episode covers

Endurance Innovation is now on Patreon [https://www.patreon.com/enduranceinnovation]! Have a peek at our page and show us some love. * 3:45 what can monitoring HR during training tell us? * A good proxy for non-invasive measurement of internal load * 5:30 how does Mikael use HR in coaching * Typically a secondary metric to provide context to pace and power metrics * 8:15 difference between value of using HR as a primary metric in beginner vs advanced athletes * 9:45 is HR ever a primary metric? Specifically in longer endurance efforts. * 14:00 testing or estimating LT1 / AeT * 75% - 80% of MaxHR * Maintaining HR with no drift over constant power on long efforts. This one is tricky. * Lactate test * HR doesn't change much over time * Talk test * HRV Dfa A1 analysis  [https://endurance-innovation-podcast.simplecast.com/episodes/87-bruce-rogers-on-hrv-estimation-of-aerobic-threshold] * 19:45 cardiac drift / aerobic decoupling * Is it useful? * Ed Coyle paper [https://x3training.com/wp-content/uploads/2021/07/Cardiovascular-Drift.pdf] * Largely caused by hyperthermia & dehydration * May be partially caused by gradual glycogen depletion in working motor units * 28:30 what do you infer from a workout with abnormally high HR * Environmental: heat or altitude * May be caused by illness, but not well understood * Stimulants like caffeine * Post COVID recovery? * 33:45 what do you infer from a workout with abnormally low HR * When combined with a higher-than-expected RPE, is a sign of overreaching * When the decline is steady, and gradual over a long time horizon, it could be a sign of improving aerobic fitness * Maybe glycogen depletion when looking at high intensity training sessions * 39:00 Mikael's thoughts on training using RPE only Check out Scientific Triathlon [https://scientifictriathlon.com/] and listen to Mikael's excellent podcast That Triathlon Show wherever you get your podcasts.