No abstract

Quantification of levator-ani muscle stiffness is feasible. Muscle stiffness is significantly different before and after birth.

The IVPS had a higher comfort score and was well retained. The LOA between the two systems was moderate, but the high sampling rate and lower susceptibility to motion artefacts of the IVPS may provide more accurate information that will be important clinically.

No differences in IAPs were found between the recommended and discouraged versions of the same exercise for all exercise types. In particular, the IAPs generated during the two versions of ball rotations, lunges, core, push-ups and squats did not differ significantly. Performing the recommended pelvic floor "safe" version instead of the discouraged conventional version of these exercises may not necessarily protect the pelvic floor and vice versa.