Contortion is a performance art in which performers called contortionists showcase their skills of extreme physical flexibility. Contortion acts often accompany acrobatics, circus acts, street performers and other live performing arts. Contortion acts are typically performed in front of a live audience. An act will showcase one or more artists performing a choreographed set of moves or poses, often to music, which require extreme flexibility. The physical flexibility required to perform such acts greatly exceeds that of the general population. It is the dramatic feats of seemingly inhuman flexibility that captivate audiences.

Acro dance is a style of dance that combines classical dance technique with acrobatic elements. It is defined by its athletic character, its unique choreography, which blends dance and acrobatics, and its use of acrobatics in a dance context. It is a popular dance style in amateur competitive dance as well as in professional dance theater and in contemporary circus productions such as those by Cirque du Soleil. This is in contrast to acrobatic, artistic and rhythmic gymnastics, which are sports that employ dance elements in a gymnastics context under the auspices of a governing gymnastics organization and subject to a Code of Points. Acro dance is known by various other names including acrobatic dance and gymnastic dance, though it is most commonly referred to simply as acro by dancers and dance professionals.