A back and internal organ supportive belt that can be installed in a chair or a seat, including the driver's seat of a vehicle or the operator's seat of a piece of equipment, to provide support to internal organs, and to the musculoskeletal system of the driver or operator. The back and internal organ supportive belt includes an inelastic support structure with upper and lower sections; belts and straps for fastening the belt to a seat, and for strapping the driver/operator into the supportive belt; vertically extendable foam lordotic support pads; an inflatable bladder for applying vertical extension and lumbar vertebrae distraction; and a pad for providing heat and/or vibration for the driver's or operator's further comfort.