[fourflys]

Originally Posted by Mark McM

It's more than just the frontal "picture". The position of the arms in front of the body can also affect how the air flows. Specifically, the riders have found that even with the upper arms and elbows in the same position, angling the lower arms and hands upward (in front of the rider's face) tends to guide the air around the head and shoulders, rather than straight into the head and then sideways around the shoulders. This so-called "Praying Mantis" position was becoming so extreme that the UCI made rules about how much higher the front of the aerobars could be above the rear of the aerobars.

kind of pretty much what I said.. but thanks!