An orthopedic device for improving posture while sitting, having a foundationmember (12) including a front portion(101) for upper legs and a bowl portion (20) for lower pelvic area. The bowlportion has a central portion (102, 103) and anupwardly inclined lateral portion (104, 105). The lateral portion and thefront portion collectively surround the central portion.The central portion (102, 103) has regions of varying flexibility and thelateral portion (104, 105) has regions of varying flexibility.The bowl portion (20) applies an upwardly and inwardly compressive force whenthe lower pelvic area is disposed in the bowlportion, and rotates on a supporting surface between a first position when thelower pelvic area is not disposed in the bowl portion(20), and a second position, rotationally forward of the first position, whenthe lower pelvic area is disposed in the bowl portion(20), to thereby cause a forward rotational tilting of the lower pelvic areainto a forward lordotic position after the lower pelvicarea is placed in the bowl portion (20).
