Do it like the Tyroleans: go into the mountains. In winter, you can ski or sled, in the summer you can hike or go mountain biking. City bikes can be rented at the NALA, and you can get mountain bikes or skis at dieboerse, a 3-minute-walk from the NALA, close to the Triumphpforte. For skiing and hiking tips, ask at the front desk.
If you prefer working out indoors, there is a gym in the basement of the NALA. There you will find a treadmill and a bicycle. For relaxation, we offer an infrared sauna big enough for 4 people. It is small but absolutely delightful! PS: You can get a bathrobe at the front desk.