Bests & Worsts Reviews from Amazon

Be very careful with this product. I've used it for about a week, and two days ago, I did it a little longer than I had before, following the directions. It was fine if I only did it twice for a count of 20. When I did it three times for a count of twenty, something happened and I can barely move. I didn't even do it as long as recommended so BE VERY CAREFUL. All back issues are not the same and you need to be sure that it is okay for your particular issue. You can potentially make your situation worse like I did.