The foot plates can detach from the machine during use, posing a fall hazard.
The recalled equipment was sold under the model name Schwinn 460.
The machine is 73 inches tall and 54 inches long.
It has has a touch-screen console, an adjustable fan and an orange-colored, oversized water bottle holder.
A medallion with the Schwinn logo is on the bottom right side of the base of the machine.
They were sold online and at specialty fitness retailers and sporting goods stores nationwide between July 2008 and May 2011 for about $1,000.
Consumers should stop using the recalled models immediately and contact Nautilus for a free repair kit that includes an extended warranty.
For additional information, contact Nautilus toll-free at 800-259-9019 between 8 a.m. and 5 p.m. PT, Monday through Friday, or on the company's website at www.schwinn.com