The Fitness Center at Philadelphia Airport Marriott
Philadelphia Airport Marriott's fitness center is acknowledged by those who travel for a living. Out of 2 professionals tracked on TripExpert, 2 mentioned the fitness center, such as Frommer's and Star Service.
Philadelphia Airport Marriott 
Frommer's
Star Service
Frommer's "When you throw in the complete fitness center and pool, the pleasant restaurant, the easy train or bus shuttle into Center City, and frequent weekend packages, it's well worth considering"
Star Service "Active guests will now have to settle for a workout in the upgraded gym"
