Is this what "Breathe" on the Apple Watch tries to help doing? I never bothered to measure the intervals, so does anyone know if there's more to it? (the watch

Is this what "Breathe" on the Apple Watch tries to help doing? I never bothered to measure the intervals, so does anyone know if there's more to it? (the watch has access to heart rate and shows a current rate result afterwards; maybe it's adjusting heart rate goals over time?)