Kegals are exercises meant to strengthen your pelvic floor muscles. This should help you in delivery when it is time to push. You use both your abdominal muscles and your pelvic muscles during delivery. Some will tell you to understand how it all works to use the restroom and try to stop the flow of urine midstream. If you can do this then you have done a Kegal. From one pregnant woman to another this particular exercise is hard to do when there's a lot of weight on your bladder. If you want to give it a try once to figure out how it works, I would recommend that you do actual kegal exercises just sitting in a soft chair.