LOUISVILLE, Ky. (WDRB) -- It's the part of the Kentucky Derby Festival that's all about fitness and physique.

The NPC Kentucky Derby Festival Championship calls itself the nation's most prestigious competition of its kind.

More than 500 contestants competed Saturday at the Kentucky International Convention Center.

Categories included fitness, figure, bodybuilding, physique and bikini.

"The perception is that this is a bodybuilding show. It's actually not. It's show business. So the competition is leading into the show with the dieting and training. But the very moment they walk on stage is all show business," event promoter Brent Jones, said.

An estimated 3,000 people showed up to watch the competition.

Copyright 2016 WDRB Media. All rights reserved.