Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Some of these exercises could cause injury!

Some of the exercises shown in this book, such as the "Furey bridge) nothing more than a neck bridge taken to extreme) have the potential to do one thing, to hurt you!Be careful and look at the routines and exercises with a grain of salt; do your own research, get informed as some of this is wrong in so many levels.Some of the info and routines are valid, in spite of the shorcomings of this book.