Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Jump start your journey to health and fitness

By most reasonable standards Senior Fitness is an exceptional book on health and fitness. Its basic message is simple and intellectually sound. The recommendations are based on both solid science (multiple studies with convergent findings) and the results of the author's own heroic battle against cancer. On a personal level I found the book quite inspiring, providing just the impetus I needed to adjust my personal diet and exercise regimen. Dr. Heidrich doesn't equivocate or offer us simplistic solutions that require no work on our part, but the reward of good health and a vigorous old age should more than justify our efforts. The message is clear, the science is sound and if you're looking for a good book to jump start your own personal fitness program this is a great place to start.