Instruct: Classify the given review as either positive or negative.
Query: Instant Relief

I tried the exercises in this book for lower back pain and was astonished to find that the pain had just disappeared after only 5 minutes of exercising. After taking anti-inflammatories of all sorts for 5 weeks, I had not been able to get rid of the pain. Performing the exercises repeatedly for a few days made me get rid of the pain for good. Nowadays, if I have the slightest back pain coming I perform the exercises immediately and the pain goes away.