Read the Book. (BOOK SPOILERS)
Typical. The book was WAY better than the movie. And some things are totally different.
1) Louden and Carla are already in a relationship. In fact, they live together in Louden's Dad's basement. And the author really describes the sex scenes. (Monkey in the tree? Tandem Bear Walk?)
2) Louden never wrestles Shute. The whole book is about his build up to that match, but the book ends as he's taking the mat. (Which kind of sucks).
3) That trip Carla and Louden took to see his Grandfather? There's a whole lot about waterfalls.
4) Louden likes to cook cans of food in the engine of his truck.
If you get the chance, do read this book. I read it in High School, and it's what motivated me to wrestle. It's a very good read, and almost completely different than the movie.