The design of a tension membrane in a gym center involves engineering principles for structural integrity, aesthetics, and functionality. The tension membrane is typically made of a lightweight material like ETFE (Ethylene Tetrafluoroethylene) or PTFE (Polytetrafluoroethylene), which is resistant to weathering and has excellent flexibility. The design must ensure that the membrane withstands wind loads, snow loads, and structural movements without excessive stretching or damage. Aesthetically, the design aims to create a visually appealing and cohesive look with the gym's interior and exterior. Structural considerations include the support system for the membrane, which can be cables, frames, or a combination of both, and the integration of lighting and HVAC systems.