Brian Nystrom wrote:
If your shoulder is getting sore, it's an indication that you're doing
something wrong. My guess would be that you're probably rushing the roll
and/or coming up head first. The stress on your shoulder comes from
pulling the paddle across the water too fast and pulling downward too hard.
One downside of extended paddle rolls is that they give you enough
leverage to roll even with poor technique.

Brian I think you're right. One thing I noticed about this roll is that
unlike other rolls failure doesn't require a swim, just a sore
shoulder!
Gene