I don't think it is possible to get used to being starved and made to run for days on end without rest in sub-zero temps. I think you should read the links before commenting. These dogs literally run their feet into bloody stumps and 86% develop gastric ulcers from the stress of running non-stop. How is that getting used to harsh conditions?
How is being outside constantly in temps well below -40 normal for any dog? They're not polar bears, they are dogs. Even huskies aren't invincible.