Don't know but this is what I found when searching:
http://www.feeds4all.nl/Item.aspx?ItemID=10249668And this:
"
Prone Cobras
Another low maintenance exercise is the prone cobra. This will aid in improving the extension of the thoracic area along with strengthening the upper erectors, rhomboids, and middle trapezius fibers.
To perform this exercise, lie face down on the floor with your arms lying next to your torso with the palms up. Initiate the movement by squeezing the shoulder blades together and raising your upper chest a few inches off the floor. A key point: as you come up, externally rotate your arms so at the midpoint your palms are facing down. Hold and squeeze at the top, then lower under control to the starting position."
and this
"Prone cobras are when you lie on your stomach and hold both legs and both arms out and up behind you for a set time. "
Prone Trap Raise:
"Prone trap raises are like Ys and Ts. Do you know what they are?
You can do them face down on a bench, incline bench, over a stability ball, or just bent over from the hips. Then you raise your arms, thumbs up, in a Y and/or a T.
Here ya go, there's a picture of Mike Robertson doing them about halfway down in this article: Neanderthal No More, Part V"
http://www.t-nation.com/readTopic.do?id=535872
