Definition of Relation. A relation is a set of ordered pairs. This seems like an odd definition but weâll need it for the definition of a function (which is the main topic of this section).
Classic (Swedish) massage and Thai massage have been proven to relieve chronic lower back pain. Classic massage for lower back pain is a technique that relaxes muscles in the area through the application of pressure. The area is rubbed in the direction in which blood flows back to the heart. Thai massage, on the other hand, is a technique that pulls and stretches the area of the back and neck.
Electric back massagers are powered by a motor which causes it to vibrate or move in a specific direction, thereby massaging your back without any work on your part. An example of an excellent manual back massager is the classic Body Back Buddy. good hand held back massager can also help relief chronic back pain. Although the seat type massagers may be ideal for a relaxing overall back rub, hand held back massagers work better for treating chronic pain and trouble areas.