Abstract: A pelvis support assembly is provided. The assembly includes a bottom plate having a first end portion and a second end portion. The assembly further includes a pelvis support plate having a first end portion and a second end portion. The first end portion of the pelvis support plate is pivotally coupled to the first end portion of the bottom plate. The pelvis support plate is sized to support a human pelvis region thereon. The assembly further includes a positional adjustment member operably coupled between the bottom plate and the pelvis support plate. The positional adjustment member holds the pelvis support plate at one of a plurality of operational positions relative to the bottom plate.