Effects of axial extension on pelvic floor displacement and abdominal muscle activity during a pelvic floor muscle task.

Background: The effects of axial extension on pelvic floor displacement and abdominal muscle activity during pelvic floor muscle (PFM) exercises are not well known.

Objective: To clarify the effect of sitting axial extension on pelvic floor displacement and abdominal muscle activity during a PFM task.

Methods: Pelvic floor displacement, abdominal muscle activity, and subjective kinesthesia of the PFM were compared between the resting and axial-extended sitting positions during a pelvic floor task in 34 healthy young men.