I hear obtaining a six pack interferes with normal waist movements unless you do waist excercises?
July 31st, 2010 | 
Author: So, what does this mean? I plan to get a six pack this summer but I don’t want it to limit my movement somebody explain this and suggest some exercises, I heard this from another question.
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no
it wont affect ur normal movent
Toning your core will most likely INCREASE your mobility around your waist. Whoever said that it limited your movement in the other question was an idiot.
That idea comes from people thinking that big, muscular guys, are "muscle bound". Yes, some guys do get a little stiff, but that’s not because they’re muscular, it’s because they’re stiff. They don’t stretch. Do the work and stretch your muscles and you’ll have no problems with mobility. Stretching will actually help tone your core, so your 6pack can go from just another 6pack, to a bundle of twisted steel and sex appeal.