 Synchronized swimming, synchronized swimming, officially known as artistic swimming since 2017, is a hybrid form of swimming, dance, and gymnastics, consisting of swimmers performing a synchronized routine either solo, duet, trail, mixed duet, free team, free combination, and highlight of elaborate moves in the water. Accompanied by music, artistic swimming is governed internationally by fiend and has been part of the Summer Olympics program since 1984. Synchronized swimming demands advanced water skills, requires great strength, endurance, flexibility, grace, artistry and precise timing, as well as exceptional breath control when upside down underwater. Competitors show off their strength, flexibility, and aerobic endurance required to perform difficult routines. Swimmers perform to routines for judges, one technical and one free, as well as edge group routines and figures. Synchronized swimming is both an individual and team sport. Swimmers compete individually during figures, and then as a team during the routine. Figures are made up of a combination of skills and positions that often require control, strength, and flexibility. Swimmers are ranked individually for this part of the competition. The routine involves teamwork and synchronization. It is choreographed to music and often has a theme. Since the 20th century, synchronized swimming has predominantly been considered a women's sport, with the Summer Olympics only featuring women's duet and team events. However, international, national and regional competitions may allow men to compete. And FINA introduced a new mixed duet competition at the 2015 World Aquatics Championships. FINA officially renamed the sport from synchronized swimming to artistic swimming in 2017 a decision that has faced mixed reception.