Has anyone else had the problem of aerobic exercise causing stomach irritation and cramping?

If so..has anyone found a type of aerobic workout that doesn't?

what type of aerobics were you doing?

Jogging and things like pilates. It seems to be ones that have alot of impact and ones that strain the whole abdominal region. I don't really know what kind of aerobic exercises you can do that don't rattle around your stomach and strain your lower ab region too much.

Riding a bike used to be good for me and didn't strain me much because it was more on the legs than the abs.. but I don't have one anymore and don't really know what to do in place of it.