Currently following the 12 week build me up programme to the letter.
I spent a few months previously building up my VO2 max after a long lay off as I’m carrying a spinal injury.
I also plug my Garmin 830 in when Zwifting on my smart trainer as it helps me maintain my cadence by watchin it, and wear a heart rate monitor.
Issue I am having is despite following a structured training plan on Zwift, my Garmin has told me my training is “Unproductive” and dropped my VO2 max by 2. Any ideas why??