question about abs/ core page

[breetbree]

i know mark says for strong abs/ core, you just contract your abs during activities through out the day. since it's only for 10-20 seconds or so at a time, are you supposed to have days off in between days that you randomly contract your abs? or should i contract my abs every day through out the day? thanks in advance.

[jakey]

you do not need to worry about taking days off from 'randomly contracting your abs.'

full body compound movements will give you great abs - squats, deadlifts, pullups. to recover from movements like that, you need days off. not for randomly flexing muscles.