VO2 Max going down but Fitness points are increasing
A week and a half ago my VO2 Max was 53 - I completed a HM race and got 1600 points for it (I am also a little bit sick).
3 days later I did a 10k tempo run - VO2 Max goes down to 50 and my Fitness points are 1576????
Did Intervals next day - VO2 Max didn't move (that's okay)
Did parkrun (5km run) on Saturday - Heart rate drops half way through from 160 to 110 - fitness points drop to 207. V02 Max increases by 1
Did a slow HM on Sunday and VO2 Max drops by 3. Highest ever fitness points 1700+
Yesterday did a 10k run and again over 1500+ Fitness points and VO2 Max drops by 1.
So VO2 Max has dropped by 6 in a week and a half.
Am I sick or dehydrated? is my watch playing up?
(All runs post initial HM have been on flat grade)