contortion

Plural: contortions

Noun

• the act of twisting or deforming the shape of something (e.g., yourself)
• a tortuous and twisted shape or position
  • "the acrobat performed incredible contortions"
• The act of contorting, twisting or deforming something, especially oneself.
• A form of acrobatic display which involves the dramatic bending and flexing of the human body.

Synonyms

crookedness, deformation, torsion, tortuosity, tortuousness