Hazard: The seat can unexpectedly detach from the Krankcycle's frame during use, posing a fall hazard to users.

Remedy: Repair

Consumer Contact: Johnson Health Tech North America toll-free at (866) 218-3674 from 8 a.m. to 5 p.m. CT Monday through Friday, or online at www.matrixfitness.com and click on Safety Notice at the bottom of the page.

Description: This recall involves all Johnny G. Krankcycles by Matrix with detachable seats that can be removed from the frame by lifting up on the seat. The Krankcycles have handles that the user turns in a circular motion for cardio exercise. Consumers can use the machine in a seated or standing position. The Krankcycles measure about 57 inches tall by 27 inches wide by 42 inches long. They are black and silver-colored. KRANKcycle and Matrix are printed on the machines.

Incidents/Injuries: Two injuries from falls when the seat detached have been reported, including one report of broken ribs and one report of a back injury requiring surgery.

Remedy: Consumers and exercise facilities should immediately stop using the recalled Krankcycles and contact Johnson Health Tech North America to schedule a free repair, which consists of a service technician permanently bolting the seat to the frame or removing the seat for which the consumer will receive a refund. This includes any Krankcycles sold online.

Sold by: Johnson Health Tech to consumers, health clubs, military facilities, physical therapists, public parks facilities nationwide and they were also sold on various websites, including www.bike-on.com, from January 2008 through January 2012 for between $2,200 and $2,700.