Instruct: Classify a given Amazon review as either positive or negative.
Query: Surprising

I expected some discussion of problems people over 50 have keeping their weight down. There is almost no mention of weight or weight loss, except to say that losing weight slowly, as advised, consists of not eating the equivalent of a small piece of cake each day. A lot of the book is for people who want to do more aggressive cycling than I will likely do. Still, it pushes the rider to be more aggressive for more improvement. The chapter on psyching is very good and highly recommended. The book also discusses using a heart rate monitor to know when a period of recovery has done its work.