This is a link from the CrossFit Journal. It's a discussion board talking about strict pull ups, kipping pull ups, butterfly pull ups, and the inherent danger of kipping prior to establishing a solid foundation of strength and/or mobility in the shoulder. I know he's mentioned in the past - 5 good, strict pull ups in conjunction with shoulder mobility prior to kipping...I was curious if he (or anyone else) had anything to add to this video or any other disagreements with it (other than his previous statement of 5 good pull ups and adequate shoulder ROM).
http://library.crossfit.com/free/video/CFJ_Offline_6Russell_Pull_ups_ipod.mov
Just curious.....
(P.S. Hopefully the link works...otherwise copy/paste).
Thanks!