Not to be argumentative, but they shouldn't have to push that hard to go poop.
IMO, 2 is still young, and your child just may not be ready yet. But observe when he or she usually has a bowel movement (is it an hour after eating, or right before bed, etc.), and take it upon yourself to suggest pottying at that time. Teach them to "listen to their body" by noticing the signs of when they have to go (for example, my son used to hide under the table), and always be available for them when they need help. :-) Good Luck!
at 6:14 PM on Jul. 1, 2008