Tell if it is possible that my running VO2max is 10 units/grades lower than my cycling VO2max? Why is that? I thought that VO2 represents general fitness etc.
VO2max is exercise specific, so you will get different values for different sports and are not comparable in between them, so that is perfectly normal, just means that in your case right now your muscles are currently better at cycling than running.
Your HR Zones are also likely going to be different BTW.
I understand that it is different when we talk about ftp But I thought that VO2 is rather general number and it shouldn't differ that much between activities. And Whats more - I believe it should be the other Way round i. e. running VO2 should be higher than cycling :D
No, the measured VO2max is not an absolute value, it may vary between different activities, just like heart rate thresholds, zones, etc
Also take into account that what the Fenix is giving you is not even the measured VO2max, it is just an estimate so don't take it too seriously, in my case for example the values from my Fenix/HRM are off by 5-10% to may actual measured VO2max.
Whichever sport you are more experienced in is likely to have the higher VO2Max. VO2Max is not just about the ability of your heart & lungs to supply oxygen, but also the ability of the muscles to accept delivery - part of fitness adaptations is increased blood supply to the relevant muscle through a denser network of capilliaries. That said, if you are pretty experienced between the two, 10 pts sounds like a large difference.
How are you measuring bike power? L/R imbalances can cause inaccuracy with single sided power meters, wheel-on trainers in particular can require careful setup and calibration. Many on-bike power meters require regular zero-offsets to be performed.
I have the same problem, i'm 45 not in that great shape but i have cycling (MTB) 46 and running 39, even if i'm a much better on the bike than running i'm sure i don't have a fitness age of 20 year cycling !!! The weird thing is that the IQ vo2max data fields are giving much more similar values (set cycling with power in the IQ field). cheers !
