>>1355091I find that people who've lived at sea level their entire lives start to get shortness of breath and other slight symptoms of altitude related acclimatization effects at around even just 8,000ft-9,000ft (2400-2700m), but you can acclimatize to it in just a few days at that elevation.
I've lived between 1,100 ft and 7,000 ft ASL in my life and after living at 7,100ft for several years in AZ I went back down to the low valleys and found I had to re-acclimatize to the low elevation and hot stuffy air for a few days, so it can go two ways sometimes. Not as bad as bringing a Sherpa that lived at 14k ft their whole life down to sea level, but it still can effect you although some people are effected by it more than others.
