A seating system providing front support and rear support for the human torso. The front support is by an anterior support device having two pads, which pads are laterally adjustable to fit the different spreads in the iliac crests of different persons. Preferably, between the first two pads is located a third pad with adjustability to accommodate the differing abdominal protrusions occurring in different persons. The three pads are concavely shaped and receive the convex shapes of the anterior waist of a person. The anterior support pads are hinged to arc forward and rearward. The anterior support pads are released to arc by retracting a cable, which retracting is caused by the pressing of a lever. The anterior support device has an assembly for installation on a bicycle; other assemblies for other installations can be made. A posterior support device is complementarily combined with the anterior support device.