: These had my core on 🔥🔥🔥🔥 this morning with Mr. Vest!! It's the moves while being in this plank position for 10 reps is what's killer! Try 4 sets between weight sets then tell me for yourself! 😝 Last week I did this cross-over tap move with push-ups unweighted and it was just as challenging! #core #planks #fitspirationbyprissy #getyousome