I can't say for sure from the video, but you might be overextending your back a little bit.
I can't say for sure from the video, but you might be overextending your back a little bit.
rectus abdominis are the 6-pack muscle. Also, "gear" is a loaded term, but if you believe the belt will hold back your strength gains, or is some form of cheating, you're mistaken about its function, and I recommend this article:
http://startingstrength.com/articles...ear_gibson.pdf