JOIN OLYMPUS EXECUTIVE FITNESS TODAY if you want solid results in the comfort and privacy of a smaller, private, executive workout space. At our Naperville gym and fitness center there's no waiting in line, just the best equipment, personal training with professional staff, and results just waiting to happen. Olympus was voted Naperville's Best Gym By Naperville Magazine. Olympus Executive Fitness Center is conveniently located in Naperville, Illinois, within CityGate Centre next to Hotel Arista on the northeast corner of Route 59 off of I-88. Olympus is a private fitness facility that offers individual, partner and small group personal training, as well as yoga classes and other specialty programs & workshops.