Retrograde methods of accessing and treating collagenous pelvic tissue from a fixed point behind the endo-pelvic fascia, particularly from a space of retzius, are disclosed. Performing treatment from the space of retzius provides for simple and reliable placement and application of the system which in turn enhances both safety and efficacy of such retrograde methodologies. Generally, the systems of the present invention comprise at least a two-part assembly including a penetrating cannula or trocar and an expansible energy applying applicator that is preferably dismounted from behind the endo-pelvic fascia, particularly the space of retzius. The systems and methods are particularly well suited for the treatment of incontinence and other conditions related to insufficient collagenous pelvic tissue support.