The gym at Hotel Federwerk receives high praise from guests, who often highlight its excellent and comprehensive facilities. Many have noted the gym is very well equipped and the quality is quite outstanding. The fitness room is frequently described as excellent and consistently well-maintained. Guests appreciate the additional amenities, such as the sauna and speak positively about the very nice staff providing support. The only minor notation is that guests should remember to make a reservation in advance to use the gym, ensuring a smooth and organized experience.