Abstract: A seat construction corrects the pelvis so that it influences a proper alignment of the body. The seat construction has at least four independent seat assemblies which are supported by a base plate. Each seat assembly includes a frame shaped support affixed to the base plate, a rigid support plate affixed to the top of the frame shaped support, and a full foam seat cushion affixed to the top of the support plate. In an alternative embodiment, the seat construction has at least four independent seat assemblies which are supported by a base plate. Each seat assembly includes a frame shaped support affixed to the base plate, a rigid support plate affixed to the top of the frame shaped support, and a full foam seat cushion affixed to the top of the support plate.