Interior Space and Exhibition Design Simple Training Gym by Carlie Ling - K.D Hsu Simple Training is a fitness center interior located in Shanghai. The design returns to the origin of fitness, with a single focus on exercise in a calm, home-like setting. White walls and timber work are combined with soft natural light from large windows. A square layout places the functional areas around the main spaces, so circulation is direct and odd corners are reduced. Storage is consolidated vertically. Specialty flooring in the instruction room withstands heavy impact and lowers impact noise. Space is also reserved for yoga classes.