If you can do them properly that way, that’s ok. If not, go for bicycles – they are a good bit harder already on their own!

I am now able to do 12/12/12 with a 25lbs plate, but as far as plates go, the next one is 35lbs. I’d have to ignore the 10% rule, but I can still do 7/7/6. Is that fine? Or would you suggest I use something else?

Thank you! 🙂

You can try this:

http://evilcyber.com/fitness/the-ab-exercise-you-can-do-while-brushing-your-teeth/

If you want to see the most development in your workouts, do those first. If you want to see them in cardio, do that first.

The abs are muscles that are often under stress, so they usually don’t get sore that much.

It’s possible that you may not be doing the exercise difficult enough to induce growth. If you can do 3×12 reps with ease, add a bit of weight to your crunches.

If the abs aren’t sore from that, you can go ahead and train them right on the next day.

no, I don’t expect to see visible results already and I know about the spot reduction myth, I am already quite skinny anyway. My problem is I never seem to feel any aches or anything afterwards although I am sure I have got the form right now, finally. My question is just will it be worse for me building abs to do the ab workout on consecutive days? if so i will just be patient and keep working, maybe adding a few extra sets in on the days that I do abs and maybe do some bicycle crunches too.

If by seeing no progress you mean the abs muscles still aren’t visible, you may have fallen for the spot-reduction idea:

http://evilcyber.com/losing-weight/spot-reduction-myth/

This explains all you need to do:

http://evilcyber.com/fitness/how-to-get-six-pack-abs/