There's a great place for bicycles and fitness equipment located right here in central Illinois, Russell's Cycle & Fitness, 10 Valley Forge Plaza, Washington.
For almost 30 years, Russell's has had a passion for bikes and fitness. They carry fitness apparel, treadmills, car racks, child seats for bikes, and, of course, bikes and bike parts. They even have used bikes! And Joe is one of the friendliest, most helpful guys I've run across in a store in a very long time.
Their website has a lot of great resources, http://www.russellsfitness.com.