The evolution of cheerleading from the early days of a male-dominated cheering section, 1950s innocent pom-poms and modest sweaters to eye-sizzling barely-there, skin-revealing outfits.
Cheerleading can be traced back to the late 19th century United States, when crowds started chanting encouragement to home teams. Credit for organizing the first cheers comes courtesy of University of Minnesota student Johnny Campbell, who encouraged students to chant: Rah, rah, rah! Sku-u-mar, Hoo-rah! Hoo-rah! Varsity! Varsity! Varsity, Minn-e-so-ta! during the 1898 season.
Cheerleading was an all-male domain for decades and it wasn't until the 1920s that women started to join the ranks. Today more than 90 per cent of cheerleading participants are female, though men still join squads at the college level.
Pom-poms have been the cheerleaders accessory of choice since the 1930s is actually derived from the French word pompe, tuft of ribbons. The early crepe-paper models, which bled in wet weather and came apart easily, were replaced by a vinyl version in the mid-1960s.
Photos arrange in sequence from 1920s until 2010s.