Kegel exercises strengthen the pelvic floor muscles, which support the uterus, bladder, small intestine, and rectum. Women can do Kegel exercises, also known as pelvic floor muscle training, just about anytime. It's a popular exercise for pregnant women to prepare the pelvic floor for vaginal childbirth. Kegel exercises may also aid in regaining pelvic floor muscle strength due to pregnancy, childbirth, age, and weight gain. Many gynecologists recommend Kegel exercises.