Heart rate recovery is a sufficient indicator of sympathetic and parasympathetic nervous system reactivation after exercise.

“I think honestly I think heart rate recovery is illustrative it's illustrative of what you wanted to get to because what we see is heart rate recovery is driven by what the reactivation the balance of those two it's turning the sympathetic down as quickly as possible and turning the Vegas the parasympathetic up as fast as possible so heart rate recovery has already given you that information without having to get as granular as pulling out the you don't NE have to get that level of you can just see the heart rate drop”