Since buying my 1030plus two years ago my VO2 Max has fluctuated between 24 and 25 according to the garmin. Garmin tells me i am in the bottom 5% for my age group and have a vo2 score for a 78 year old. Im 58 and consistently in the top 10% of strava times. Now i had an old injury that required surgery so i have not been anle to train for the last three years but this score makes no sense. I have now recovered from knee replacement surgery and reached what I consider to be a baseline fitness to build on. I paid for a laboratory test which gave me a score of 39 which seems about right for where i am. Garmin hasnt moved off 24. What the *** is going on?