PART 2 - (30-SECOND ONE ARM PLANK ON EACH SIDE) X2
AND PLEASE DON'T SAG WHILE DOING IT ;)
POST HOW LONG YOU WERE ABLE TO HOLD IT FOR!
So I finally did the other side the other day. I don't think I've ever held plank so long. I was screaming by the end!! :) And my abs were already sore by the end of the day!