The gym at Miura is noted for its well-equipped facilities, providing guests with a decent space for fitness activities. However, some visitors have pointed out areas for improvement, such as the absence of an additional treadmill and a shortage of dumbbells. The cost of water, priced at €4 per bottle, is seen as a drawback, with suggestions for perhaps offering complimentary water and towels to enhance the gym experience. Despite these minor inconveniences, the gym is considered functional, although some may find the damaged equipment to detract from the overall appeal. It's important to note that as per recent reviews, the spa and broader fitness area were not yet operational, which may influence guests seeking a complete wellness experience.