Re: What is the functionality of kipping
I'm new to CF but I'm a research geek, so here's my take on this.
Kipping pull-ups provide more "work" to someone versus strict pull-ups. Remember, work = force * distance divided by time. Thus, the more reps you do in a shorter amount of time results in increased work output (higher watts and such). The body weight is still the same and the distance hasn't changed when comparing strict versus kip.
There's a video that shows this difference. CF is about maximizing "work".
This is one reason why you see many doing butterfly PUs due to the increase in "work" since it's a fast repetition method.