The Fitness Center at Hilton Chicago O'Hare Airport
The fitness center at Hilton Chicago O'Hare Airport is praised by travel writers. Out of 5 reviews that we tracked, 3 referenced the fitness center, including Gayot, Star Service and Oyster.
Hilton Chicago O'Hare Airport 
Gayot
Star Service
Oyster
Gayot "A business center and gym give this property an edge over nearby lodgings"
Star Service "On the lower level is a small indoor pool, a whirlpool, a sauna and a full-blown fitness center (which awkwardly overlooks the small indoor pool)"
Oyster "However, the gym, breakfast, in-room Wi-Fi, and parking come with hefty fees, and its 860 rooms, while spacious and soundproofed, have generic chain decor"
