How do you know the Elvie kegel trainer really is effective?

All our product development was guided by a scientific advisory group including a number of well-known researchers in biofeedback and pelvic floor exercise such as Dr. Rufus Cartwright, Imperial College; Dr. Kay Crotty, Physiolink; Prof. Linda McLean, University of Ottawa and Dr. Jeroen Bergmann, Oxford University. Multiple studies show that giving women real-time biofeedback is one of the most effective methods for Kegel exercises with direct force measurement being the gold standard. The Elvie kegel trainer is the first product for women that measures force directly and offers a significant advance over existing products that rely on air pressure changes and are thus unreliable.