Not a bit of it !

That's acclimatisation for you.

However - even acclimatised individuals need to watch
correct hydration - and rapid transits from high to
low atmospheric pressure.

There's a great deal we 'experts' do not understand
about the body - although we often think that we do.

As good old Granny used to say 'There's none so queer
as folk' !

Stan
UK.