If you are looking to tighten your behind but can’t seem to get that “perky-look” no matter what exercises you do, then this next article is a must read. “The glute-ham tie-in,” as it is often referred to, is basically the muscular development of your glutes. Your diet is also very important in this process. Check out 10 “underbutt” exercises to help give a lift to your derriere!!