Why? Because unless you’re very good and regimented about sitting (or lying) around each day, squeezing your PC muscles multiple times, you probably could use a little help working out your pelvic floor muscles. Kegel balls are great for this, because they work while you move around; if you’re running errands, heading across campus, wheeling down the block, etc, the smaller balls inside the bigger balls rumble/vibrate a little, helping your body work out the muscles, even if you aren’t conscious of doing it. It’s working them out without even having to think about it. [...]