My Butt Is Doing What Squats and Butt Wink Girls Gone Strong

My Butt Is Doing What Squats and Butt Wink Girls Gone Strong My Butt Is Doing What? Squats and Butt Wink. My butt does this. I thought it had something to do with my bad back, but this PT outlines various causes.

Original article and pictures take http://www.girlsgonestrong.com/my-butt-is-doing-what-squats-and-butt-wink/ site