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VO2 Max and LT change after reset!

I reset my 955 (FW 12.23) for a few reasons...

  • I felt it was misreporting my LT (4:29/km @ 162 bpm yet I ran 4:14/km @ 164bpm for 90mins meaning my LT is even faster than 4:14)
  • VO2 Max (66) hadn't changed for approx 2 months yet my fitness was improving
  • Race predications were off eg ran a 1:29 half but was reporting a 1:34

After a reset and a week of it capturing data and on same FW (12.23), its now reporting a..

  • VO2 Max of 58
  • LT of 4:07/km @ 163 bpm
  • but race predictions still off eg 5K prediction of 19:55 yet just ran a 19:00

FW 12.27 not available yet for me which may address the race predictions. But more interestingly for others and even Garmin is why VO2 Max and LT changed by alot after a reset?! My fitness didnt improve that much within a week!