Hey, my name is Erin and I'm a former US Junior Olympic certified swim coach and personal trainer. And fitness is my passion, so I cannot wait to share it with you guys. Alright, last move. We're going to grab our physio ball, my favorite tool. Come down to the floor. Okay. So, coming down to the floor, put your legs on top of the ball and lie flat. Bring your palms up into your bridge so you're in a nice straight plank. Dig your heels into the center of the ball. Curl it in and bring it out. Stay up. Curl it in and bring it out. So you should feel a nice contraction in the hamstrings and the gluts. The entire time, you're curling and obviously using the hamstrings more. You're going to do 20 of those, rest, and repeat.