All in all at the time, but you can already see what it was all about, performance, performance and more performance. Luckily, today we are able to do it all a little bit differently, disputable if we could rather persuade you to train with submarine-like doors and in underground rooms.
In contrast to the system at that time, most people now go a different way; they do not change the air pressure as in the natural altitude, but rather change the air composition. More about this later on on the scientific subitems.
Meanwhile various possibilities have been developed to enable athletes to train under artificial altitude conditions, there are masks and portable devices that can be carried outside, for example when hiking / running, compact devices that can be used at home with a mask (training e.g. on an ergometer or treadmill) or a tent (training or rest / sleep).
Of course, the industry has also recognized that such devices can be made good money with ambitious endurance athletes, accordingly, various devices are offered here, some providers also rely on a device rental.
Here, too, we want to discuss the advantages and disadvantages of the systems in the corresponding sub-items, and of course also the costs.