different approaches aside, I do agree the abs will grow but not to a ridiculous extent. And I also don't think that growth of ANY muscle comes from low weight high reps. Your abs are muscle tissue no matter which way you slice it. If low weight high reps builds muscle then how come X-country runner's legs aren't tree trunks?
You do whatever works for you and I will do what works for me. How does that sound?
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for sure Pi! Here's a good article with some research to back your incridibly awesome post bro!