I practiced Pilates for years. This was prior to being diagnosed with PCa. Pilates exercises develop a person's "core", which includes the pelvic floor. When my RO looked at one of my scans, I think it was the MRI, he exclaimed at how highly developed my pelvic floor is. Look at this, he said, as if I might know how unusual what I was seeing was. The structure he was pointing to was much thicker than he usually sees, and a completely different shape, he said.

I'm suspicious of any easy route to develop a muscle, i.e. with some electronic device. The NCI designated cancer center I'm being treated at has therapists who counsel patients on how to develop their pelvic floor muscles as they prepare for prostate surgery. I favor learning how to control these muscles rather than looking for some way to not learn, by having some device just do it for you.