Staying at height causes the desired physiological reactions, but the oxygen deficiency does have the disadvantage that athletes cannot deliver the maximum quality in their training. This can itself inhibit the progression of the athlete. The altitude tent brings the best of both worlds together. While you sleep, you have the advantages of altitude, while training can still be carried out with maximum oxygen and therefore quality.
According to all studies, 'Live High, Train Low' is the best training protocol with the greatest return.