Masters swimming is a swimming program for adults, featuring both individual and group events. In individual events each swimmer competes against other swimmers in the same age category, whereas in group events any four swimmers can form a relay, and the age category of the relay is given by the sum of the ages of its participants. Setting up relays in masters swimming may be harder than for professional or junior swimming, in which swimmers compete against other athletes in the same age category. In this work, an integer programming model is presented in order to optimize the assembly of relays in masters swimming, and a scheme is implemented to present the results in a friendly format for the coach. These models are applied to data from a team in Buenos Aires City, Argentina.
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