CTDs are musculoskeletal disorders involving damage to tendons, bones, muscles, and nerves of the hands, wrists, elbows, neck, and back.

CNN: Get comfortable -- computing ergonomics efforts pay off

Citing insufficient scientific evidence, they argue the government should not regulate this issue until there's conclusive proof that workplace ergonomics actually cause (or can remedy) musculoskeletal disorders.

CNN: OSHA pushing for new regulations aimed at preventing repetitive motion injuries

"There is a lack of consensus in the scientific and medical communities on the causes of MSDs (musculoskeletal disorders), " says Jennifer Krese, director of employment policy for the National Association of Manufacturers.

CNN: OSHA pushing for new regulations aimed at preventing repetitive motion injuries

Numerous studies, including research reviewed in 1998 by the National Academy of Sciences involving 66 leading specialists in orthopedic surgery and occupational medicine, suggest ergonomics can be at least partly responsible for musculoskeletal disorders.

CNN: OSHA pushing for new regulations aimed at preventing repetitive motion injuries

The goal is to stem the rising tide of work-related musculoskeletal disorders, including those known as repetitive stress or repetitive strain injuries, that account for one third of all occupational injuries reported to the Bureau of Labor Statistics each year.

CNN: OSHA pushing for new regulations aimed at preventing repetitive motion injuries