Whether it be an old grain silo, a historic railroad factory, or an industrial warehouse, all of our operating gyms have been repurposed from existing structures. The preservation and renovation of historic properties is an important part of a sustainable, smart growth approach. It is estimated that a new, green, energy-efficient office building that includes as much as 40 percent recycled materials would nevertheless take approximately 65 years to recover the energy lost in demolishing a comparable existing building. Furthermore, repurposing old buildings—particularly those that are vacant—reduces the need for construction of new buildings and the consumption of land, energy, materials, and financial resources that they require.