87 - Bruce Rogers on HRV Estimation of Aerobic Threshold

Endurance Innovation is now on Patreon [https://www.patreon.com/enduranceinnovation]! Have a peek at our page and show us some love. * 2:30 Bruce’s introduction to HRV * 7:30 defining heart rate variability (HRV) and its response to exercise * 11:45 the non-linear HRV index DFA a1 (alpha 1) * 12:30 looking at fractals on random walks  * 17:00 a discussion of exercise intensity distribution and thresholds * 20:00 the challenges with measuring or estimating the aerobic threshold (aka LT1, VT1) * 26:00 A new detection method defining the aerobic threshold for endurance exercise and training prescription based on fractal correlation properties of heart rate variability [https://www.frontiersin.org/articles/10.3389/fphys.2020.596567/abstract] * 28:30 3 ways to determine LT1 through HRV DFA a1 analysis * Progressive ramp test past estimated LT1 and using Kubios for analysis * Constant 5-8’ power / pace intervals and using Kubios for analysis * Constant 6-8’ power / pace intervals using HRV4T Data Logger * 36:30 using the Data Logger for discrete testing vs live ride analysis  * 42:45 equipment needs * Kubios free or premium * HRV4T Data Logger, using workout mode with 2’ intervals * HR Straps: Polar H-series * 50:15 shortcomings of HRV DFA a1 analysis * Missed beat artifact >5% in intense training or in populations with cardiac arrhythmias  * A low-quality signal analysis by software  * No test data for female athletes * So far only tested on cycling and running Take a look at Bruce's excellent blog [http://www.muscleoxygentraining.com/2020/]and follow him on Twitter [https://twitter.com/bjrmd].  For a review of HRV, have a listen to our interview with HRV4Training founder Marco Altini [https://endurance-innovation-podcast.simplecast.com/episodes/43-marco-altini-and-hrv4training].  The HRV4T HRV Logger can be found in the Apple Store.