Just tried the Lizard movement from Day 13, and I have to say, not as easy as they make it look in the video!
I think I lack the core strength to move smoothly. I'm doing the static position okay, but when I have to move I feel like I'm not keeping my hips low.
Here's a short video that I made of how I move during the Lizard movement. I'd greatly appreciate any feedback.
<iframe width="640" height="360" src="https://www.youtube.com/embed/T97c_5YM7ok" frameborder="0" allowfullscreen></iframe>