[Paddlewise] deep "Greenland" low brace

Long-time lurker here, an older fellow who converted to using a West 
Greenland style paddle a few years back, because it seems much easier on 
aging joints and muscles. I've never taken the time to learn the deep low 
brace, or any of the "Greenland-style" rolls. Recently a couple of friends 
have been encouraging me to learn a few of those.

My question to day has to do with the deep low brace - paddle well under 
the water with the end near the boat deeper than the end furthest from the 
boat, paddler leaning forward and toward the on-water side of the kayak, 
sculling down and then back up. When I try this, it seems to impose a lot 
of stress on shoulder, elbow, and wrist of the on-water arm. After 
experimenting with the brace several times one day recently, it was clear 
that my left elbow (my left arm was the "on water arm") wasn't going to 
take any stress for a couple of days. It also seemed that this brace would 
be a good way to dislocate a shoulder.

Is this stress inherent in the stroke, or are there some little tricks and 
subtleties which reduce or eliminate upper extremity stress?

Bill Hansen
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