since i got my apple watch my cardio fitness looks like this - however before getting it i barely did any sports. since having it i almost do sports every day, even when it is just 0.5-1h fast walking. So how come my cardio fitness is declining?
vo2 max on the Apple Watch is limited to outdoor walk and outdoor run workouts. if you aren’t pushing yourself on those, it won’t change. I row, kickbox, and lift weights, so I don’t get any meaningful vo2 calculations.