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The muscles of the legs are the largest and strongest muscle group in the body, and therefore contribute a large portion of the work during the rowing stroke. The muscles of the upper body and torso simply add to the work of the legs as the angle between the calf and the thigh increases and the effectiveness of the legs declines.

The speed at which the leg angle opens is related to the speed of the boat moving through the water and is relatively slow. The speed of the drive phase is anything from ½ second to 1 second (discussed later in section in Ratio and Rhythm).