never been an ab's man so a few quick qu's i've never understood.

1. when doing crunches with a twist which side are you working when eg. taking left elbow to right knee? im paranoid the left side is bigger than the right so i'd like to even them up - even tho they are covered in fat at the mo!

2. how can i target the lower two of my supposed 6 pack? it seems like they dont ache after a set of sit ups and im just working the top few.

3. you dont think twists are worthwhile - what if you have some weights on your shoulders not just a broom handle? i've never thought about it but find myself doing twists when trying to catch my breath in between doing squats!

thanks, Matt