The Intensity Pelvic Tone Vibrator works in two ways: It has electrodes that stimulate the muscles of the pelvic floor, causing them to contract and therefore strengthen. The vibration feature of the Intensity, which you can control separately, improves pelvic floor muscle tone the same way any vibrator does: They all help the user to experience orgasm, which is intense contractions of the pelvic floor. Those contractions, whether from the electric pulses or orgasm, improve muscle tone, just like flexing your bicep does. The contractions also increase blood supply to the pelvis, which improves function and sensation, too.
Yes, orgasm is good for muscle tone! And improved muscle tone can strengthen future orgasms, as well as holding organs in place and preventing or minimizing incontinence. I guess I’d call that a virtuous cycle.