<iframe src="https://player.vimeo.com/video/277168795?background=1" width="640" height="360" frameborder="0" allowfullscreen></iframe>
Beginning (my grandma) – Keep both feet on the ground, don’t hold a weight, and twist side to side.
Intermediate (my mom in the middle) – Hold a medium weight, feet on the ground, and twisting side to side.
Advanced (me) – Hold a heavier weight, feet off the ground, and twist side to side.