We had a great session on a lake with Oscar Chalupsky two weeks back. He got us to consider the stroke in four steps.
The first was to focus on the "bottom" arm in the stroke - to plant the paddle and rotate without bending the arm - at least at the catch. The exit is opposite the hip and the paddle naturally "flies" out at that point.
Second step, focus on the upper arm (in the stroke). This should not be straight at the catch - Oscar said my fundamental problem was that I was keeping both arms straight at the catch, which meant that the paddle blade was already at an inefficient angle when I planted the blade.
Oscar had us on the shore, rotating while keeping the arms bent in front of us - the shape described by arms, body and paddle is the "box". That box shape needs to remain all through the stroke.
Steps 3 & 4 are the same as 1 & 2 but on the other side.
I'm probably describing it incorrectly but I'm working on an article with the Big O that will hopefully explain it a bit better - in the meantime the Forward Stroke DVD is a great one to watch.
Oscar recommended spending time on flat water in a stable boat - practising 20 strokes of each of the 4 parts i.e. you're paddling on one side at a time, focusing either on the bottom or top arm, 20 strokes of each.
Rob
Currently Epic V10 Elite, Epic V10 Double.
Previously: Swordfish S, Evo II, Carbonology Zest, Fenn Swordfish, Epic V10, Fenn Elite, Red7 Surf70 Pro, Epic V10 Sport, Genius Blu, Kayak Centre Zeplin, Fenn Mako6, Custom Kayaks ICON, Brian's Kayaks Molokai, Brian's Kayaks Wedge and several others...