ボート競技のコーチとして世界的に有名なMike SpracklenのRowing Techniqueに関する要約版がネット上に幾つも掲載されている。http://home.hia.no/~stephens/sprack.htm
The rowing stroke comprises fast movements and slow movements. The essence of good rhythm in the boat is the contrast beween them. Done well, a good motions looks smooth, continuous, and unhurried, so it can be difficult to see that contrast. ①The FAST movements begin with the entry of the blade and continue through the stroke and the movement of the hands away after blade extraction (the finish). ②The slower movements begin when the hands pass over the knees and continue until the next stroke. The inertia created by ③the power of the stroke carries the hands down and away from the body when the seat is at the backstops. The body relaxes immediately as the blade leaves the water so there is no interference with this natural free-flowing movement. The seat moves SLOWLY forwards in contrast to its speed during the stroke. The rower prepares by gathering, ready to spring from the stretcher onto the next stroke. The movement of the seat must be faster during the stroke than it is during the recovery. The sooner it leaves the backstops after the finish, the more time it has to reach the front stops and the slower it can travel. ④The hands and then the body move lively away from the finish to allow the seat to start on its way forwards.