Read publications on rowing and erging:

{color:#000000}{*}Modelling the Rowing Stroke in Racing Shells{*}{color}
{color:#000000}Maurice N. Brearley, Neville J. de Mestre and Donald R. Watson{color}
{color:#000000}{??}The Mathematical Gazette{??}{color}{color:#000000} , Vol. 82, No. 495 (Nov., 1998), pp. 389-404{color}
{color:#000000}Published by: {color}[The Mathematical Association|http://www.jstor.org/action/showPublisher?publisherCode=mathas]
{color:#000000}Article Stable URL: http://www.jstor.org/stable/3619885{color}
The water drag force {latex} D = a + bv + v^2 {latex}, where {latex} v {latex} is the velocity of the racing scull, and {latex} a, b, \text{and} c {latex} are constants that can be obtained through regression analysis from rowing data.