I actually believe that crunning is an effective way, becuase if you think about it we've been crunning since we were babies. So I dont think we'll get hurt when crunning. Then again maybe crunning is not meant for all and it'll take awhile for us to get use to crunning.
To tell you the truth, I'm not much of a reader. However, this book came to my interest. It will have a few spoilers, so you've been warned. I found it interesting that a group of young boys has crash landed on this stranded island and try so hard to survive. It begins with the main characters Ralph and Piggy, which are my favorite character, who leads the group of boys and calls them by blowing into a conch shell. In my opinion, Ralph is a great leader, he set fair rules and gives roles for every boy so they can survive on this island. However, among them is Jack who is very aggressive and starts dividing the group of boys, rebelling and running wild. Now, this brings low chances to survive for both Ralph and Piggy and sadly it doesn't really end well. But I recommend reading this book or if you prefer watching old movies or visuals check it out.
It's is very amazing to see brave mushers to do this hard course in a cold weather. The sled dogs are just as amazing. I want to know how they train their sled dogs. It's amazing that sled dogs are able to run for a long time. They're very loyal and hard working. But poor little guys. It breaks my heart that they're all pulling a heavy sled through the cold freezing snow. (T^T)
The course sounds challenging and impossible in my opinion. You really must be fit, skilled, and prepared to finish or get through the course. However, it does sound fun and tempting to try it out myself. It would also be awesome to explore and admire the course/nature. I love hiking!