Abstract: An adjustable and angled seat assembly having a base supportable on a ground surface, a wedge support member with a wedge length separating the front and rear ends thereon and a wedge height separating upper and lower ends thereon, with the lower end directly coupled to a support plate and tapering in the wedge height spanning along the wedge length to define a wedge angle ? defined by the upper and lower ends of the wedge support member. The assembly also includes a seat cushion having a seat-support surface disposed above the base and a seat-support angle relative to the base support plane and a lower surface directly coupled to the upper 704 of the wedge support member and a chest cushion having a chest-support surface disposed above the seat-support surface, coupled to the support plate, and disposed at an at an acute angle with respect to the seat-support surface.