Many people think the crunch is the ultimate ab exercise. Its not. The crunch only works out the top of the abs. So if you are looking for six pack abs and want to get rid of those love handles, this exercise is not going to cut it. In addition, it causes back and neck problems and thats the last thing anyone wants. Try the plank as a alternative. The plank decreases the risk of lower back pain as your get older, as an extra bonus to rock hard abs.