Any person going to a higher altitude is susceptible to altitude sickness, especially when going above 8000 feet. Even people in good physical shape can experience shortness of breath and longer recovery times when going through a 4000 foot change.
For example, when a traveler from Montreal (elevation 187 feet) wants to hike in the Canadian Rockies, he'll experience a 3553 foot jump when landing in Calgary (elevation 3740 feet).
It takes the human body a few days to acclimate to the lower concentrations of the oxygen in the air. People of all fitness levels can suffer from altitude sickness, but those who smoke, have respiratory problems or are prone to dizziness should take extra precautions.
Every entrepreneur has heard they need to have an "Passenger Elevator". So what is that? What does that really mean? Most entrepreneurs want to drone on for 30 minutes talking about their business opportunities almost in the hopes that a VC or group of investors will say....."OK, OK...I give. I'll invest if you will just shut up!".
News Flash....that is not how it works. It is almost comical how so many entrepreneurs network with Escalator Company. They are like a faucet. They turn it on and it pours out. Boom They think to themselves, "I'm Done...whoo, glad that is over with" and then sit there like a lap dog with their tongue hanging out..."so whadya think...huh...huh...huh? Wanna invest, huh...huh...huh?"
The only time an entrepreneur should do a core dump like that is when they are in one of those beauty contests where they parade in front of mike to give a fast pitch to a sea of faces whom they have no idea who is really an investor and even more tragic, have no way of following up with any of those "potential investors". These community do-good events serve only one purpose...to be memorable so when you meet that potential investor another time, it will ring a bell and they have a positive emotional response. The odds of an investor rushing up to you after hearing 60 seconds of your heart and soul are so low as to be non-existent.