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 gets Firstbeat
Suunto 9 Series Gets New Sleep & Fitness Metrics from FirstBeat | DC Rainmaker
Suunto SS050824000 | Suunto 9 Peak Pro 3.05 cm (1.2") Dot-matrix 43 mm Gold GPS (satellite)
Amazon.com: SUUNTO 3 2020 Edition Fitness Multi Sport Watch with Adaptive Training Guidance (Moss Grey) : Electronics