Peter Attia· MD
I think training frequency matters which is where you get Zone to right you can't do V2 Max training five six days a week we do a lot more Zone 2 we do a lot more frequency and volume of that and I think that translates uh more than likely into a higher V or into a higher HRV even if you didn't go out and do a bunch of the zone or the you know V2 max type work