The term used for health disorders caused by repeated biomechanical stress due to ergonomic hazards. CTDs are a class of musculoskeletal disorders involving damage to the tendons, tendon sheath, synovial lubrications of the tendon sheaths, or the related bones, muscles, and nerves of the hands, wrists, elbows, shoulders, neck and back. The most frequent occupationally induced disorders in this class include: carpal tunnel syndrome, epicondylitis (tennis elbow), tendonitis, tenosynovitis, synovitis, stenosing tenosynovitis of the finger, DeQuervain's Disease, and low back pain.

See "musculoskeletal disorders".

Term used for injuries that occur over a period because of repeated trauma or exposure to a specific body part, such as the back, hand, wrist and forearm. Muscles and joints are stressed, tendons are inflamed, nerves pinched or the flow of blood is restricted. Common occupational induced disorders in this class include carpal tunnel syndrome, epicondylitis (tennis elbow), tendinitis, tenosynovitis, synovitis, stenosing tenosynovitis of the finger, DeQuervian's Syndrome, and low back pain.

Injuries of the muscles, tendons, and nerves resulting from doing the same thing over and over without sufficient rest of variety of motion between repetitions. Carpal Tunnel Syndrome is CTD, as is tendonitis. Repetitive motion injuries is another common term for this group of disorders.

Cumulative trauma disorders (CTDs) are injuries of the musculoskeletal and nervous systems that may be caused by repetitive tasks, forceful exertions, vibrations, mechanical compression (pressing against hard surfaces) or sustained or awkward positions. Cumulative trauma disorders are also called repetitive motion disorders (RMDs), overuse syndromes, repetitive motion injuries or repetitive strain injuries.