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Additionally, I looked into video motion tracker tools and found http://www.cabrillo.edu/~dbrown/tracker/. I will play around with this program to see if we can use it to analyze the videos of people on ergs (like 2013.06.05 William Tyler Nebel Rowing.mov) to plot the positions of hands, rower body, and seat to make a more concrete case for our arguments and have original data.