Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great read, this book completely changed the way I lift.

I was very skeptical when I dove into this book but the results speak for themselves.I have gained so much in so little time and have devoted a fifth of the effort to do so. The author uses facts and examples to back up everything that he claims and explains it as simply as he can. It is a very entertaining book. I am just your average college student and it has made life so much easier. I used to lift five days a week for 2 hours a day, now I lift twice a week for about 25 mins per workout. This book opens your eyes to reality, muscles need to have recovery time. If you follow what he says, you will have results, period.