The Fitness Center at Hyatt Regency Hong Kong, Tsim Sha Tsui
The fitness center at Hyatt Regency Hong Kong, Tsim Sha Tsui is mentioned by professional reviewers. Of the 6 publications tracked on TripExpert, 2 referenced the fitness center, including Frommer's and Oyster.
Hyatt Regency Hong Kong, Tsim Sha Tsui 
Frommer's
Oyster
Frommer's "A good location, outdoor pool, and gym make this a practical address in the heart of Tsim Sha Tsui"
Oyster "Spectacular vistas of Victoria Harbour and Hong Kong Island can be viewed from some guest rooms, the gym, and a few common areas"
