The title says they're for back pain, but they also fix a lot of leg problems. These help with a wide variety of tendon/ligament muscle, joint, and nerve problems especially those caused by sitting in the same position for hours while you work. Stretching before you sit down, during breaks, and after you get up can reduce long-term tendency for problems. Stretches also relieve acute pain when it flares up. Take five minutes to treat a cramp when it first appears and you will lose a lot less time than if you are miserable for hours.