Jennifer Dahlgren Fitzner is an Argentine hammer thrower. Having spent much of her life in the United States, she competed as an amateur for the University of Georgia. She set the US collegiate hammer record and was the NCAA Outdoor champion in both 2006 and 2007. She is a three-time gold medallist at the South American Championships and won the bronze medal at the 2007 Pan American Games.

The 2006 South American Championships in Athletics were held at the Estadio La Independencia in Tunja, Colombia from 29 September to 1 October. The competition represented a departure from the traditional biennial cycle of the championships, a decision taken partly as a response to the lack of major competitions that year for the region's athletes, as well as the fact many athletes would instead focus on the 2007 World Championships in Athletics and the Pan American Games which were scheduled for the following year. The stadium's location at 2810 metres above sea level aided the performances of athletes competing in the sprint and field events. A total of 44 events were contested, of which 22 by male and 22 by female athletes.