The Science of Contortion-- CircusTalk
Flexibility & Contortion, Circus Center
Nestor Cortes Thrives for Yankees by Being Himself - The New York
A Pitching Contortionist Bends His Way Into Shape
Book Circus Contortionists
This Japanese Bodybuilder Stripped Down to Pitch - Gayety
How flexible are you (physically)? - Quora
Nestor Cortes Thrives for Yankees by Being Himself - The New York
Kinematic and kinetic comparison between American and Japanese