The Hollow Position and Pullups

Took the day off from work to get some things around the house taken care of.....namely get the car serviced.  Pesky slow tire leaks!!!  A comment about the "hollow position" made  by Jordan Vezina concerning ways to strengthen my pull ups caused me to do a bit of online searching for a good description of the "hollow position".  Especially since Jordan had a difficult time explaining this technique (sorry Jordan!)  It appears that this position is critical for many gymnastics maneuvers and the following site provides an excellent description of how to get into the "hollow position" as well as some exercises that will strengthen this position.  I am going to give this a try for a few weeks and will let you know how it effects my pull ups.