Do Rh negatives have higher lung capacities?

Basques have 5-7% Neanderthal DNA

We have found that Neanderthals presented around 20% larger lung capacities than modern humans, both absolutely and relative to their lean mass and stature.

https://www.nature.com/articles/s42003-018-0125-4#:~:text=We%20have%20found%20that%20Neanderthals,their%20lean%20mass%20and%20stature.

New research provides evidence that Rh proteins act as CO2 gas channels

How long can you hold your breath?