imagine that you did 1000 sit ups the previous day. ‘but i can’t do 1000 sit ups,’ you might interject, so fine — imagine someone pointed a gun to your head and demanded that you do 1000 sit ups. cool, now you can add that psychological burden to the soreness that your abs are feeling due to having done 1000 sit ups. now rotate that pain down into your pelvic floor region and imagine someone is simultaneously shoving their hand down on the center of your hip bones, which you never realized was a place that existed / had nerve endings in the first place, as if they were trying to break them from inside you. also you are probably dehydrated and have lost a lot of blood so you feel weak and sleepy and this is why you are late to work because you spent 15 minutes tensely curled on your bed waiting for the advil to kick in before you could manage the act of sitting up.