**Take your CORE training to the next level with this 3-minute strong core challenge. It doesn't sound too challenging but it ends up being extremely difficult.** FREE CORE Training Report: The 5 BEST 'Core-Killer' Exercises === Do you think you have what it takes to do this 3-minute core challenge? OK it might not be as intense as a we're making it out to be but after doing these 6 exercises with no rest, your lower abs will be burning!! Few of you will laugh at
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