This book is a compilation of the authorÕs research articles on twisting somersaults from the past forty years with application to gymnastics, tumbling, trampolining, diving and the aerials event in freestyle skiing. A computer simulation model is used to determine which techniques can produce twist and which are used in practice. The ability to control twisting and non-twisting somersaults during flight is investigated. Applications to the coaching and performance of twisting somersaults in gymnastics, trampolining, diving and freestyle skiing are presented.