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Thanks, that's helpful. So it's basically analysing your Heart Rate response to your output, which is what i thought.
I wasn't planning on placing too much emphasis on it ajust good to know what it's based on. Is gonna be fucked up somewhat by the fact that, if it is looking at past rides and the current one, i've only just got the tool. Plus on turbo my Heart Rate is about 20% higher than outdoors on long intervals
jim1985-
If it's using HRV, which it should be as anything else would likely be little more than voodoo bullshit, it measure the tiny irregularity between each heart beat. Oddly enough, the more irregular the more recovered you are, the more regular the heart beat the more fatigued or stressed you are - see: http://www.myithlete.com/what-is-hrv/
hippy
http://www8.garmin.com/manuals/webhelp/forerunner920/EN-US/GUID-DAC27D10-886A-4EA8-8339-674479E9574A.html
https://www.firstbeat.com/en/consumer-products/features/
Recovery advisor keeps track of your physiological state so you know when to take it easy and when you are ready for the next intensive run. After the workout, it shows the time your body needs to recover before the next effort, so you can optimize the balance between rest and training.
How it works?
To gauge estimated recovery time after the workout, your personal cumulative load during a workout (EPOC, Training Effect) and daily response to exercise are measured. Available for all aerobic exercises, most detailed information available for running when running speed is available or for cycling with power (watts).
Recovery advisor includes:
Recovery time after exercise
Tracks personal cumulative body loading during a workout and daily response to exercise to gauge estimated required recovery time to train again.
Warm-up readiness check
Tracks daily performance and indicates whether body is able to respond to training well today.
Warm-up readiness check available for running / cycling only.
https://www.firstbeat.com/en/science-and-physiology/white-papers-and-publications/
https://www.firstbeat.com/app/uploads/2015/10/Stress-and-recovery_white-paper_20145.pdf
https://www.firstbeat.com/app/uploads/2015/10/Recovery-white-paper_15.6.20153.pdf
I asked about HRV ages ago here: http://www.lfgss.com/conversations/169130/?offset=50#12180970