Exercise bench methods and apparatus

An exercise assembly includes a bench sized and configured to support the back of a supine person. In a first mode of operation, the bench is structurally supported in a fixed, upwardly facing orientation relative to an underlying floor surface. The structural support is selectively removed by the person to switch to a second mode of operation, in which the bench is tiltable laterally relative to the underlying floor surface. Left and right pivot poles are mounted on one end of the bench and selectively pivoted back and forth by the feet of the person lying supine on the bench.