Lecointre competed in the "470 class" at the 2012 Summer Olympics. She finished fourth with Mathilde Géron in that event. She was a bronze medalist in 470 at the 2015 World Championships and won the world title in 2016 with Hélène Defrance. Lecointre and Defrance were selected to compete in the 2016 Summer Olympics and they won the bronze medal in the women's 470 class.