i had/still have that problem. it is going away slowly. must admit i have never exercised on this program but still lost 65lbs. i know i need to exercise especially my abs. i know what exercises i need to do it is just motivating my butt to do it.

try reverse sit ups - lie flat on your back - knees bent feet flat and lift your butt up and hold it. to make it even better try doing it but instead of feet flat leave only your heels on the ground its harder but it works.