Idania Sandoval, 14, trains at the National Institute of Sport in Managua March 4, 2015. A study done by the Psychology alumni of the National Autonomous University of Nicaragua (UNAN-Managua) revealed that about 1 million women in Nicaragua suffer from domestic violence. (Photo by Oswaldo Rivas/Reuters)

Idania Sandoval, 14, trains at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

Nohelia Balmaceda, 17, attends a boxing class at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

Idania Sandoval, 14, trains at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

Nohelia Balmaceda, 17, attends a boxing class at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

A woman trains with a punch bag at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

Women train with punch bags at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

Idania Sandoval, 14, poses before her training session at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

Irene Aguirre, 23, picks up her boxing gloves after training at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

Irene Aguirre, 23, poses before training at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

Irene Aguirre, 23, attends a boxing class at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

Nohelia Balmaceda, 17, poses before training at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

Irene Aguirre, 23, kisses her boyfriend after her training session at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)

Irene Aguirre, 23, applies lipstick after her training session at the National Institute of Sport in Managua March 4, 2015. (Photo by Oswaldo Rivas/Reuters)