Killer Plank

Running around a little crazy today - Corey left for Chile, I'm going up to visit my brother and I'm going to try and put him through a quick 10 minute torture session (he doesn't know it yet... haha!) I did do my planks today - 12 minutes total, but for my 3 min of center planks, I switched 1:30 of the center planks for KILLER PLANKS, aka swiss ball planks, there are several names for it. Here's the how to: Get up on your hands, put your feet or shins on an exercise ball and hold it - it really increases the intensity!