The building offers a wide range of floor heights for the three main activities: fitness, weight training, dance, bodybump and climbing. It is also able to host many other practices. It can be extended on the east side to accommodate the water pool. Our design illustrates this diversity and evolutivity while giving our building a unitary aspect without compromising future potential extensions (notably the water pool). To achieve this, we propose the implementation of a "net" made of an arrangement of vertical metal blades that envelops the "raw" volume in its entirety like a case. This envelope plays the dual role of solar protection and mechanical protection. It gives the building a precious and serene character.