Not sure how accurate watch-based VO2 Max really is, but before getting the Hydrow, it said my VO2 Max was 38.5, giving me a "fitness age" of 42. I'm 40. After using
Suunto 9 Series Gets New Sleep & Fitness Metrics from FirstBeat | DC Rainmaker
No Vo2 max | Suunto Community Forum
Suunto 5 Peak športové hodinky, All Black - MTHIKER Shop