87 - Bruce Rogers on HRV Estimation of Aerobic Threshold
University of Florida's Bruce Rogers is on the show this week to explain a novel approach in using heart rate variability (HRV) analysis to identify the aerobic threshold in cyclists and runners.
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- 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
- 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 and follow him on Twitter.
For a review of HRV, have a listen to our interview with HRV4Training founder Marco Altini.
The HRV4T HRV Logger can be found in the Apple Store.