Danish camp boosting Sierra Nevada’s altitude with hypoxic tents

Rikke Møller Petersen and Lotte Friis presenting the altitude tent here, that they are supposed to sleep in together for two weeks, boosting the Sierra Nevada altitude from approximately 2500 meters (8200 feet) to about 3000 (9850 feet). Maybe (and I’m speculating here) it has something to do with stabilizing altitude also, with the perceived altitude at Sierra Nevada varying a lot because of the mountains (2300 meters one day, 2700 the next), compared to much more stable altitude at camps on big plateaus like Flagstaff, Arizona.