Related
Options

Anaerobic score

Fidgetbum
over 4 years ago

Does anaerobic score work out from power or HR?  Either way I never seem to get any.

Todays turbo session I would have expected it. 4x4 Mins 120% FTP, HR was in Z5 for nearly 3.5 mins and Z4 for 8 mins. 

Am I just misunderstanding anaerobic effort.

thanks in advance 

  • 0 over 4 years ago

    3:41 in zone 5 doesn't seem very much to me in terms of anaerobic effort, especially considering that you're not very far into zone 5. (based on a threshold @ 177 and a max during the session of 181). Also, you're not suppose to get any anaerobic effect in zone 4 if the transition between z4 and z5 corresponds with your actual lactate threshold.

    How have you defined your zones, and what's your max HR if I may ask?

  • 0 over 4 years ago

    Hello !
    From my experience, anaerobic only get credited on short, very high cardio intervals with low heart rate recovery. On the HR graph that would look like peaks, and they have to be distant from each other, otherwise it is rather high aerobic which would get credited :

    Anaerobic Large, sudden increases in intensity quickly* Maximum speed
    Repeating Intervals
    Sports performance
    * Accumulates quickly, but only during the first few minutes of a substantial and sudden increase in intensity. As your aerobic energy system catches up to satisfy the increased energy demand, it transforms into a high-intensity aerobic effort.


    You can find some background about this on the firstbeat website :
    Workout Labels - Firstbeat
    White_paper_anaerobic_13.3.2016_MS170517HBReview(final)artreview_2.docx

    When I want to increase anaerobic I usually do 10 or 15 x 200m or 400m intervals, with long enough recovery time (4 minutes or +).

    Hope this helps !

  • 0 over 4 years ago

    If you have a power meter, it comes from power rather than HR.

    They may be above threshold, but 120% VO2Max intervals aren't really anaerobic. If you think about it, VO2Max is the level at which your body's oxygen uptake hits its maximum. Once your efforts are harder than that, pretty much all the extra effort has to be anaerobic, and that's when your anaerobic score will increase more quickly.

    I suspect if you tried some shorter intervals at 130-150% (or higher), that is when the anaerobic score would increase.

  • 0 over 4 years ago in reply to SAHO

    Its howing as 203 on the bike and 204 for the run. Must have auto populated though based on my threshold. Last time I tested proper max was a couple of years ago and it was 205. 

  • 0 over 4 years ago in reply to mcalista

    That makes sense, thank you! I will give it a go to see if it helps.

    Would it do the same use power on a run? I don’t have a fancy running power meter, just the one built into the heart rate strap and the widget.

  • 0 over 4 years ago in reply to drkglb

    That makes sense. I was doing 4 x 4 mins with a 5 min min easy recovery.