Unaware of what Strava is, but if generally relying on electronic devices for such things altitude, geolocation and/or steps count/distance measures and so on.. then.. as elaborated here https://youtube.com/watch?t=431s&v=fDj2kYIF-sE at about 07:10.. similar descrepancies/inaccuracies creep in with other functions too (other than heart rate monitor).. when it comes to sudden variations or spikes in altitude, location, suddenly having to run and so on.
Accuracy apart, https://youtube.com/watch?v=GQkkHtBD1BM I feel that longevity (failsafe performance for years) is another issue currently, as the technology is fast transitioning (and not plateaued/matured as much).
Accuracy apart, https://youtube.com/watch?v=GQkkHtBD1BM I feel that longevity (failsafe performance for years) is another issue currently, as the technology is fast transitioning (and not plateaued/matured as much).