Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Don't waste your money!

There are so many better books out there on health and fitness, don't bother with this one. I just had my body fat done and the charts in the book are completely wrong. Also, 3/4 of the book is charts. The remaining 1/4 is just the most general fitness info you could find anywhere. probably on the back of a Special K box.