Wall Sit Challenge

Here's a video to teach you how to perform a proper wall sit against a stability ball. If you need a ball here's a link to order your own: https://www.amazon.com/gp/product/B0187LW0A6?ie=UTF8&tag=kimmerkelfitn-20&camp=1789&linkCode=xm2&creativeASIN=B0187LW0A6