I've been working out 7 days a week, one day chest and shoulder, another day biceps and chest, or something like that. However I've been working out my abs 7 days a week, and in this forums I can see so many times that the muscles need to rest for at least one day. So, what am I achieving with working out my abs 7 days a week, do I get the same effect as working them out 3 days a week, or maybe even I get a smaller effect because I don't let the muscles rest?