Join Date: Jul 2009
Location: Brisbane, Australia
Well when you are jumping over a course, you look in the direction of your next jump so you can set yourself up. Not only that, but apparently your head weighs 25% of your body weight. Directing the weight of your head to the direction you want to go is essentially telling the horse where to go next = picking up that lead.
Hope this helps, others will probably be able to go into more detail.
There is one principle that should never be abandoned, namely, that the rider must first learn to control himself before he can control his horse. This is the basic, most important principle to be preserved in equitation - Alois Podhajsky