Why is it whenever time abs exercise is done i urinate

whenever time i try doing abs exercise i wet my self

your pelvic floor may be weak. try doing kegel exercises.
http://en.wikipedia.org/wiki/Kegel_exercise

Your bladder muscles are weak. Kegel exercise do help unfortunately for some of us over 40 who have had kids this may not be enough. I always wear pads when I exercise just in case. Good Luck!

Well lets have a doctor, examine you to see if you have a weak bladder but sounds like you taking in a lot of water and do you know what happens when a high level of water intake is mixed with a high level of toxins in the body, well if we not sweating enough during exercise then hey urinating will be the other option. Weak bladder easily mistaken for a unhealthy liver, bad diet (not enough fruit and veggies), I mean a lot men have to urinate of sex or ejaculating, so does that mean they have a weak bladder")