Cheerleading is an entertainment sport that ranges from chanting to strenuous physical activity for motivating sporting teams, entertaining spectators, or competition based on organized routines. The competitive rounds typically range from one to three minutes and contain elements of dance, jumps, cheers, tumbling and stunting. Cheerleading began in the United States, and remains majorly in America, with a predicted 1.5 million members in all-star cheerleading. It was started during the late 18th century with the insurgence of male students, and after the American Revolutionary War, students encountered harsh treatment from teachers. Organized cheerleading began as an all-male activity whereas the female cheerleaders were overlooked for a very long time until the mid-1940's where they started participating in the school and collegiate level cheerleading programs. Nowadays, professional cheerleaders and dancers most of whom are females in it cheer for sports such as cricket leagues, football, basketball, baseball, wrestling, or hockey. There are only a few of professional cheerleading leagues around the planet; some of the professional leagues include the NBA Cheerleading League, the CFL Cheerleading League, the NFL Cheerleading League, the MLB Cheerleading League, the MLS Cheerleading League, and the NHL Ice Dancers. Although professional cheerleading leagues exist in many countries, there are no Olympic teams.