Tennis elbow is actually a misnomer in that it occurs in roughly only five percent of people who play tennis. Anatomically, the cause of tennis elbow is repetitive use of the forearm extensor muscles, especially if they weren’t used much previously. Practically any occupation, sporting endeavor, or household activity that has repeated use of the forearm and wrist may lead to this condition. Certain activities and occupations are more commonly associated with tennis elbow, such as plumbing, painting, fishing, butchering, computer use, and playing certain musical instruments. Tennis elbow is most common in adults between the ages of 30 and 50, but can affect people of all ages.
People with tennis elbow complain of pain that expands from the outer elbow into their forearm and wrist. The pain primarily occurs where the tendons of your forearm attach to the bony areas on the outside elbow. In addition to pain, people with tennis elbow experience weakness that makes it particularly difficult to hold a coffee cup, turn a doorknob, or even shake hands. Tennis elbow can cause weakness when twisting or grabbing objects.