Well an Alaskan husky is not really a breed, so what type of husky is it?
If your taking about the type of Husky us Alaskans use, well that's a combination of dogs, usually husky/GSD/greyhound, etc..
You just answered your question... an Alaskan Husky is a type of Husky, such as the Showing,Standard,or Sprint-racing husky.
However, the alaskan husky is a gene pool in the fur, mixed with many breeds, even with wolves, however it's not considered a Hybrid.
The type of sled pulling dogs alaskans use is actually the Alaskan Husky, the preffered breed to pull sleds faster and with more endurance than Siberians. Alaskans are actually a spitz breed without GSD, most likely greyhound, foxhound, staghound, and even doberman(besides the Siberian Husky)
The main thing about Huskies is shedding! Not excersize
Having a husky tired is not difficult at all, they get exhausted over mental games instead of long walks.
The destructive part is true though... a bored husky is a furry demon.
''I will bite your shoes, pee your carpets, crap your sleepers, dig your garden, chew you to death, impersonate houidini'' that must be their memo
VERY EASY to train, they are a dream! However consistency is a must with huskies... you MUST use NILIF and Doggy zen on them, it will make your life easier with them. Always have them with a leash when outside, recall training must be practiced all his life, have it in the commands lists, but don't trust him offleash, his running instinct might be bigger than the will to please you.