Arise from the dead, thread!

I was searching for info about how Garmin estimates VO2Max and came upon this thread. But anyways, it appears that there is indeed a correlation between HR and power, and that it is quite easy to fool the system too:

I noticed when I do intervals above threshold at high cadence (e.g. 90-100rpm), my HR tends to be higher and at the end of the workout, my Garmin reports my VO2 Max going down. On the other hand, when I do the same type of over-threshold intervals but at lower cadence (e.g. 60-80rpm), my HR tends to be lower and at the end of the workout, the Garmin says my VO2 Max has gone up. It's very easy to "game the system" this way, last night I got my VO2Max back up from 58 to 60 just by doing low cadence work for the past two days so... yeah, it's totally an unreliable metric like others have mentioned.