87 - Bruce Rogers on HRV Estimation of Aerobic Threshold

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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.