Abstract: A recliner support system (RSS) configured to provide support for individuals having poor posture control. The RSS may include a base assembly configured to move with reclinable furniture between upright and reclined positions. The RSS may include one or more straps configured to secure the base assembly to the reclinable furniture. The RSS may include one or more harnesses attached to the base assembly and configured to maintain a stable and well-aligned body position. The RSS may include one or more supports attached to the base assembly and configured to provide body support. The RSS may include a seat cushion including a bottom portion, a rear portion, and a flexible hinge portion connecting the bottom and rear portion and configured to move with and support a body in an upright sitting position, in a reclined position, and while moving between the upright sitting position and the reclined position.