So, I have studied a lot about fitness, weight training and the like, I know a lot of general knowledge, practical wisdom and et cetera. I don't follow a strict workout regimen, but I'm not a total slacker. However, recently I have come upon a divide in my research. On the topic of whether or not it is okay to work your abs everyday or not. Now, my common sense tells me that it is a muscle like any other muscle group, you work it too much and it won't have any time to repair and it will never improve and can possibly decrease. Right, that makes sense and I'm sure many people would agree with that. However, in my many readings on the subject, I have come across people who believe it is okay to do abs every day of the week, assuming you are not adding weight and focusing on a sorta anaerobic approach. This also makes some sense to me, in that, if you're not working your abs particularly hard or to failure, they won't break down enough to necessitate the extra rest alloted to them, and since usually the goal with abs is to define them and not bulk them up, light and frequent anaerobic exercises makes some sense. But still, I cannot overlook the common sense that I would otherwise approach the situation with. Most recently I was reading about bruce lee. He was absolutely devoted to his abs, he believed that the core was responsible for the majority of true strength(especially for martial arts), and having a strong and developed(but not bulky) core was absolutely priority. He worked his abs everyday. Without fail, he'd do complicated and simple exercises, with weights and without weights, anaerobic and isometric and all that jazz. He worked them all the time. Now, it's easy to say "but he was a god, an exception to the rule, you can't judge your workout solely on his already insanely developed physique", but still, he had one of the most impressive sets of abs ever in his day. So, personally, I was working my abs everyday, with perhaps a days break if I felt I worked them too hard. I wouldn't kill them, but I'd work them thoroughly, all the components with a variety of exercises. I can say with confidence I have seen substantial gains to my core in the past 4 or 5 months(still got a fat padding, but my core is still much stronger, people kept commenting on how much taller I'd gotten, when in reality my posture had just improved greatly...etc., but since then, gains have been minimal or unnoticed. So, I've been starting to experiment with different exercises, some using weights, some using different movements than normal...etc. And I've come to this split in thinking. To restate, my common sense tells me that it's okay to work my abs everyday unless I work them heavily to the point where they feel worked/sore, in which case, let them rest for a day or two. Shrug. So what's the verdict?