Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Highly recommended for healing aging knees!

Yoga for Healthy Knees is at the top of the list of books I recommend for teaching yoga to people over 50. I always show this book to my students of any age with knee problems. The author is an expert who overcame her own knee pain using yoga. This is a clear, well organized book with a positive, uplifting attitude!-- Suza Francina, author, The New Yoga for People Over 50, The New Yoga for Healthy Aging and other books for people at midlife and older.