Cheerleading ranges from yelling to intense physical activity for sports team motivation, audience entertainment or competition based upon organized routines. The routines usually range anywhere from one to three minutes, which may contain many components of tumbling, dance, jumps, cheers and stunting in order to direct spectators of events to cheer for sports teams at games or to participate in cheerleading competitions. The yellers, dancers and athletes involved in cheerleading are called cheerleaders. Cheerleading originated in the United States, and remains predominantly American, with an estimated 1.5 million participants in all-star cheerleading.