In a month or so, we will be heading from Alabama to Colorado Springs. The elevation will go from 597 ft to about 6,000. Just wondering if we should expect to "feel" the thinner air, or will we adjust...
If you're not venturing any higher into the mountains you might not notice a thing. OTOH it doesn't affect everyone the same way or even affect the same person the same way every time. Here is a good article about altitude sickness and the things you can do to help yourself.