Paddling Mythbusting - Shallow or Deep?

I am asked quite frequently whether the hand should move shallow, underneath the board, or deep, well below the board when paddling.  Which one is more efficient?  Which one provides more power?  Which is more effective?  

In this video, we investigate whether the myth of paddling with the hand close the board and shallow is more effective than going deep.  Hope you enjoy it!

Feel free to contact me with question - I'm only an email or phone call away. 

Cheers!