Holy heelstrikes, Batman!

I took my camera in today to try to document what I was doing differently (or trying to do differently). This combination of frame captures illustrates pretty clearly the main point of this entire exercise.

These frames come from video footage of me running in my "normal", "new" and "barefoot" strides - capturing the exact moment my foot makes contact with the treadmill.

Which landing would you guess puts the most strain on my Achilles tendon (and the spot where it's attached to my heelbone?) I'm putting my money on the "normal" frame on the far left. Video clips coming next...