Knowing about the type of arthritis you have and its causes and symptoms can help you best determine your exercise goals and plans. Arthritis is defined as inflammation of a joint, but it often affects more than just the joint, sometimes compromising the tissues that surround a joint and affecting other bodily systems.

Arthritis doesn't have to stop you from leading a full and active life.
Within the joint, the primary tissue affected is the articular cartilage. This tissue covers each inner part of most joints; it helps to disperse forces at the joint surface and allows for smooth movement of the joint. Loss or irregularities of this cartilage can increase friction within the joint; this is the main manifestation of osteoarthritis. A special lubricant called synovial fluid is produced within the joint that decreases normal friction and allows the surfaces to glide easily. This process is similar to oil allowing a hinge to move smoothly. Alteration in synovial fluid production is one of the early effects of rheumatoid arthritis.