Businesses are gearing up to challenge the new Occupational Safety and Health Administration rule aimed at reducing repetitive-stress and musculoskeletal injuries. Under the rule, proposed on Nov. 23, about 1.9 million employers would have to hire trainers and pay wages and benefits during convalescence for repetitive-stress injuries.

Business groups are expected to ask the U.S. Court of Appeals for the District of Columbia Circuit, which has jurisdiction over any challenge, to reject the proposals once they are final. The coalition, including the U.S. Chamber of Commerce and the National Association of Manufacturers, also may ask the court to stay the rules during any review, attorneys said.