Various general exercise related discussions. Find out what it takes to reach your fitness goals through daily effective exercise. With so many options we try to find out what works best.
You could, to make the muscles bigger. I usually reccomend not using them. You do not want to over do it on the abs without working out the lower back. Your own bodies resistance should be enough.
If it gets to the point where your ab routine feels ineffectual, then add some very light weights. You still want to stick in a higher rep range. I usually use a really light plate when doing upper body crunches, as well as obliques. I don't use any weight for lower ab movements.