Review on Lumbar Back Stretcher for Lower Back Pain Relief - Evening Ritual Back Stretching Device - 4-Level Back Cracking Device for Home Use - Spine Deck Back Cracker - Ultimate Back Pain Reliever by Holly Naragon

You definitely can't use this on the highest settings right away unless you're flexible enough already, but if you ever get there or are just curious about the hardest Attitude to try, you have to fight. The plastic plate needs to be bent in place and inserted into the notch, and because it's a thick plastic, it's not easy to bend. I've used it a few times and while I haven't noticed a significant reduction in back pain caused by my computer chair, I feel like I'm making progress in repairing the damage.