That actually happens to me all the time I limit the amount of abdominal works out because it get these bad pains that I think are maybe like muscles spasms like if I sat up straight it hurts more so I give it a few minutes mean while I massage the area at the same time. I think its normal I never thought to ask the doctor since the surgery I've had my lad band for three yrs n still feel the same when I do abdominal work outs. I must say it makes a bit challenging especially since that's the area Id like to work on the most.