In 1948, Dr. Arnold Kegel published a study about exercises to increase muscle tone of the pelvic floor muscles (specifically pubococcygeus) to treat women with incontinence (leaking pee) after childbirth. Scientists are super original so the exercises were named after him. Thus the birth of Kegels (Get it!? Birth... kegel!? Just LOL silently for me ok?)
Since then Kegels have become a magical, fix all cure.