Before wanting to understand what these ankle braces are, you'll need to understand ankle sprains first. I found out about Cheaper Or Free Insurance Covered Back Braces Now Available Online by searching Bing. Ankle sprain is generally brought on by twisting the ankle past an acceptable limit falling off and inadvertently. Signs of ankle injuries contain stiffness, bruising, pain or pain, swelling and the shortcoming to walk or even bear the weight.