The summation of motion in rowing is fascinating to examine, given the complexity of the stroke....
Rowers legs and back are fully compressed with shins perpendicular to the water, arms are fully extended as the oar enters the water. As a result the blade of the oar must also be perpendicular to the water.
Blade entry occurs at maximum shoulder extension and is initiated by an independent movement of the handle in relation to the shoulders.
Arms remain straight.
At this point the shoulders and arms provide connection for the power source of the legs, hips and lower back. They do not provide the power
Legs engage while the back begins to extend.
A release angle of 110 degrees in considered optimal.
Hands brush the abdomen, at this point the hands tap down to remove the blade from the water.
Blades are feathered to become parallel to the water and allow for a more aerodynamic position and to allow rowers to clear any wash or rough conditions that may be present.
The recovery sequence operates in reverse of the drive sequence.
The hands carry the oars to an extended position.A pivot at the hips occurs, maintaining a strong lower back
Slide moves when body passes through 90 degrees.
Full body swing is established by half slide.