Tendons attach muscle to bone. Tendons play a role in moving our spine and extremities (shoulders, elbows, wrists, hips, knees, ankles).
Tendonitis is inflammation of a tendon. Usually that occurs gradually after a repetitive activity or activities.
Inflammation causes pain, affects normal joint movement, and affects strength which causes weakness.
Tendonitis occurs due to repetitive activities, such as exercising, pitching, throwing a football around, biking, jogging playing tennis or golf. Tendonitis can also occur when doing repetitive house chores, such as cleaning/scrubbing floors, raking, doing yard work.